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Radio Waves
 
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What are Radio Waves and how do they work?
Views: 703215 TheOnLineEngineer
Electromagnetic Spectrum: Radio Waves
 
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http://www.facebook.com/ScienceReason ... [email protected]: EMS Electromagnetic Spectrum (Episode 2) - Radio Waves The electromagnetic spectrum is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic distribution of electromagnetic radiation emitted or absorbed by that particular object. --- Please SUBSCRIBE to Science & Reason: • http://www.youtube.com/Best0fScience • http://www.youtube.com/ScienceTV • http://www.youtube.com/FFreeThinker --- MEASURING THE ELECTROMAGNETIC SPECTRUM The electromagnetic (EM) spectrum is just a name that scientists give a bunch of types of radiation when they want to talk about them as a group. Radiation is energy that travels and spreads out as it goes - visible light that comes from a lamp in your house and radio waves that come from a radio station are two types of electromagnetic radiation. Other examples of EM radiation are microwaves, infrared and ultraviolet light, X-rays and gamma-rays. Hotter, more energetic objects and events create higher energy radiation than cool objects. Only extremely hot objects or particles moving at very high velocities can create high-energy radiation like X-rays and gamma-rays. • http://imagine.gsfc.nasa.gov/docs/science/know_l1/emspectrum.html --- RADIO WAVES Radio waves are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Like all other electromagnetic waves, they travel at the speed of light. Naturally-occurring radio waves are made by lightning, or by astronomical objects. Artificially-generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, satellite communication, computer networks and innumerable other applications. Different frequencies of radio waves have different propagation characteristics in the Earth's atmosphere; long waves may cover a part of the Earth very consistently, shorter waves can reflect off the ionosphere and travel around the world, and much shorter wavelengths bend or reflect very little and travel on a line of sight. Discovery and utilization: Radio waves were first predicted by mathematical work done in 1865 by James Clerk Maxwell. Maxwell noticed wavelike properties of light and similarities in electrical and magnetic observations. He then proposed equations, that described light waves and radio waves as waves of electromagnetism that travel in space. In 1887, Heinrich Hertz demonstrated the reality of Maxwell's electromagnetic waves by experimentally generating radio waves in his laboratory. Many inventions followed, making practical the use of radio waves to transfer information through space. Propagation: The study of electromagnetic phenomena such as reflection, refraction, polarization, diffraction and absorption is of critical importance in the study of how radio waves move in free space and over the surface of the Earth. Different frequencies experience different combinations of these phenomena in the Earth's atmosphere, making certain radio bands more useful for specific purposes than others. Radio communication: In order to receive radio signals, for instance from AM/FM radio stations, a radio antenna must be used. However, since the antenna will pick up thousands of radio signals at a time, a radio tuner is necessary to tune in to a particular frequency (or frequency range). This is typically done via a resonator (in its simplest form, a circuit with a capacitor and an inductor). The resonator is configured to resonate at a particular frequency (or frequency band), thus amplifying sine waves at that radio frequency, while ignoring other sine waves. Usually, either the inductor or the capacitor of the resonator is adjustable, allowing the user to change the frequency at which it resonates. In medicine: Radio frequency (RF) energy has been used in medical treatments for over 75 years generally for minimally invasive surgeries and coagulation, including the treatment of sleep apnea. • http://en.wikipedia.org/wiki/Radio_waves .
Views: 410924 Best0fScience
How Radio Waves Are Produced
 
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UNLOCKING THE MYSTERIES BEHIND RADIO WAVES. Electric current creates magnetic field, oscillating electric current creates oscillating magnetic field and not "electromagnetic wave" as current belief. Electron has a standing- electric field and magnetic field at right angle (watch video structure of electron). The flow of electrons in a conductor is essentially caused by the attraction between the electric fields of mobile electrons and "fixed" positive charges in the conductor. Oscillation of electrons in a conductor is caused by the alternation of electric polarity in the conductor. Because of electric field and magnetic field of an electron is at right angle, when oscillates the electric field of the electron will be parallel to the oscillation and magnetic field will be perpendicular to the oscillation.This oscillation of the electron creates transverse wave on its magnetic line and the oscillating magnetic line is radiated to space. http://www.amazon.com/author/atom http://www.facebook.com/novaphysica https://www.youtube.com/user/atommodel
Views: 795842 AtomModel
How Information Travels Wirelessly
 
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Understanding how we use electromagnetic waves to transmit information. License: Creative Commons BY-NC-SA More information at http://k12videos.mit.edu/terms-conditions
Views: 197505 MITK12Videos
How do Radios Work?
 
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Patreon: patreon.com/ConcerningReality FB: facebook.com/ConcerningReality/ In the modern era, radio waves control everything. From the tunes in your car driving down the road to the police radio in the car that's pulling you over for not signaling your turn. These waves are undetectable and invisible to human senses but they make up the foundation of modern technology. While the root of modern connected technologies may be radio waves, the underlying tech that makes radios possible is a rather simple concept to understand. Any person can make a simple radio in their home for a few bucks, which is part of the reason this foundational tech dates back to 1895. All images and videos courtesy of the creative commons or used in accordance with fair use laws. For questions or concerns, please use the contact section on our channel. Music: Dark Fog by Kevin MacLeod is licensed under a Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) Source: http://incompetech.com/music/royalty-free/index.html?isrc=USUAN1300031 Artist: http://incompetech.com/
Views: 12827 Concerning Reality
Transmission of Radio waves Through Space
 
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Physics_p-9-10-ict-5.mp4
Views: 3974 Sabaq. Pk
Transmission Media (Part 2) Radio Waves, Micro Waves, Infrared Waves
 
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Transmission Media (Part 1) Twisted Pair Cable, coaxial cable, Fibre Optics Cable : https://www.youtube.com/watch?v=xHyJNkiGRd8&t= Keywords Ignore: --------------------------------------------------------------------------------------- Transmission Media (Part 2) Radio Waves, Micro Waves, Infrared Waves radio waves transmission micro waves transmission types of transmission media in hindi infrared waves wireless transmission media unbounded transmission media unguided transmission media transmission medium in hindi transmission medium in computer network transmission media in hindi wired and wireless communication wired transmission media guided and unguided transmission media in computer networks bounded and unbounded media communication media communication medium ----------------------------------------------------------------------------------------- What is Computer Network and Why It is Useful: https://www.youtube.com/watch?v=lY8bv9D81LE Types of Networks (PAN, LAN, MAN, WAN): https://www.youtube.com/watch?v=mYG3R2e1w5M&t= Data Transmission Modes: https://www.youtube.com/watch?v=nACnUiH7J6g Network Topologies and its Advantages and Disadvantages: https://www.youtube.com/watch?v=r5osh1oy8cE Peer to Peer (P2P) vs Client Server Network: https://www.youtube.com/watch?v=Hf_fZTB5FbU&t= Transmission Medium / Media: https://www.youtube.com/watch?v=xHyJNkiGRd8 Switching in Networking in Hindi (Circuit Switching, Message Switching, Packet Switching): https://www.youtube.com/watch?v=zMn1IeEMk8E&t= ----------------------------------------------------------------------------------------
Views: 22626 STUDY Genius
AM and FM Radio As Fast As Possible
 
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AM & FM radio have been around since way before the digital age. How can radios decode AM & FM signals only using analog technology? Freshbooks message: Head over to http://freshbooks.com/techquickie and don’t forget to enter Tech Quickie in the “How Did You Hear About Us” section when signing up for your free trial. Follow: http://twitter.com/linustech Join the community: http://linustechtips.com
Views: 475204 Techquickie
How Television broadcast works
 
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How Television broadcast works
Views: 183945 Daniel Izzo
5 Strangest Radio Stations & Most Mysterious Transmissions
 
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From an unexplained Russian radio station playing strange sounds, to the infamous Yosemite Sam broadcast... Here are five eerie radio stations and transmissions from around the world! ____________________________________________________________________ Don't forget to follow TOP5s on Social Media to keep up with upcoming videos, articles and new information! ►► https://twitter.com/TheTop5s ►►https://www.facebook.com/TheOfficialTop5s/ Special Thank you to CO.AG for the music as usual! If you are looking for music for any video production, games, movies etc. He is the man to speak to so check out his channel or send him a personal message! https://www.youtube.com/channel/UCcavSftXHgxLBWwLDm_bNvA Thanks for watching! Top5s
Views: 986794 Top5s
How Data is Transmited by RF circuits (Wifi, bluetooth, phone, radio etc...)
 
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SEE THE THEORY IN ACTION HERE: https://www.youtube.com/edit?o=U&video_id=gkc9xN9pZ4Y The video above explains the basic theory that relates to data transmission, namely how electromagnetic waves are generated by antennas and how they encode 1's and 0's. Non essential information for a hobbyist, but really interesting none the less. Component list: •1 X Arduino Uno •1 X 433MHz RF link pair •3 X LED •1 X Piezo Buzzer •1 X Push Button •1 X Resistor 330Ω •50cm Single Core Wire Equipment needed: Soldering Iron -~-~~-~~~-~~-~- Latest and Best Arduino Playlist in Collaboratio with DFRobot: https://www.youtube.com/playlist?list=PL_92WMXSLe_86NTWf0nchm-EmQIwccEye -~-~~-~~~-~~-~-
Views: 69368 Robotix
The Alien Wow Signal, 72 sec, at 1420.4556 MHz, New View! Aug 1977, UFO Sighting News.
 
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Lets crack this alien signal! The Wow! signal was a strong narrowband radio signal detected by Jerry R. Ehman on August 15, 1977, while he was working on a SETI project at the Big Ear radio telescope of The Ohio State University, then located at Ohio Wesleyan University's Perkins Observatory in Delaware, Ohio.[1] The signal bore the expected hallmarks of non-terrestrial and non-Solar System origin. It lasted for the full 72-second window that Big Ear was able to observe it, but has not been detected again.
Views: 1382390 Scott Waring
HOW RADIO WORKS - 1943
 
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The theory and operation of early radio
Views: 288410 TheShootingstar31
Wave, Modulation, AM, FM Basics
 
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In this lecture, we use an Analog Arts (http://analogarts.com/) SL987 oscilloscope to review the basics of waves, antennas, modulation concept, AM, and FM. Waves transfer energy without moving matter, similar to ocean waves or sun light. In general in air, electromagnetic waves such as radio signals travel longer than mechanical waves such as sound. To transmit information over very long distances, electromagnetic waves are used. Electromagnetic waves or EM waves spread without the need for a medium, travel at the speed of light, do not lose energy in vacuum, and can travel forever. Using a signal frequency of about 850 kHz, in December 1901, Guglielmo Marconi received the first transatlantic radio signals, the Morse code for the letter "S". An antenna converts an electrical signal to EM waves to make it transmittable. The length of the antenna inversely depends on the frequency of the signal. For low frequency signals such as electrical representation of sound out of a microphone, the size of the antenna grows to hundreds of kilometers, making the transmission impractical. Modulation overcomes this problem by mixing the low frequency information with a high frequency sinusoidal. In the modulation process, a low frequency information signal is put on a higher frequency sine wave, to produce a new waveform, which is suitable for transmission. The information is referred to as the modulating signal, the sine wave as the carrier signal, and the mix as the modulated carrier wave. Modulation process can be viewed as a ride carrying cargo from one place to another, where the cargo is the message and the ride is the carrier signal. At the destination, the detected signal is mixed with the carrier, and the resulting signal is filtered to produce the message. This process is called demodulation. AM and FM are two of the most popular modulation techniques. In AM the amplitude of the modulated signal represents the message. In FM however, the frequency of the modulated signal characterizes the message. Modulation concept is the process of varying one or more properties of a high frequency periodic waveform, referred to as the carrier signal, with an information signal, to transmit the information. It is like throwing a paper note across a distance by wrapping it around a stone. Since a sine wave is completely defined by its amplitude, frequency, and phase, in a modulation process, one or a combination of these properties is altered by the modulation signal. Once a low frequency wave is modulated, it travels longer and requires smaller transmission antennas. Modulation also allows multiple transmissions, each with its own unique carrier frequency. Each modulation technique offers its own benefits and is intended for a particular application. Both AM and FM techniques are widely used. Since lower frequencies are reflected better by the electrically charged atoms in the ionosphere, AM waves are spread in a wider area, particularly at night when the ionosphere is not affected by sun. An important advantage of FM is that it is not disturbed by outside interferences. Therefore, FM results in a higher quality transmission. The advent of digital signal processing, gave birth to digital modulation. Conceptually it is like analog modulation. However, it uses a discrete signal to modulate the carrier signal. Please join us.
Views: 6162 Academia
Astronomers detect radio signals from far away galaxy
 
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Thirteen radio bursts received from deep space; Fox News Headlines 24/7's Brett Larson weighs in on 'Tucker Carlson Tonight.' #Tucker #FoxNews FOX News Channel (FNC) is a 24-hour all-encompassing news service dedicated to delivering breaking news as well as political and business news. The number one network in cable, FNC has been the most watched television news channel for more than 16 years and according to a Suffolk University/USA Today poll, is the most trusted television news source in the country. Owned by 21st Century Fox, FNC is available in more than 90 million homes and dominates the cable news landscape, routinely notching the top ten programs in the genre. Subscribe to Fox News! https://bit.ly/2vBUvAS Watch more Fox News Video: http://video.foxnews.com Watch Fox News Channel Live: http://www.foxnewsgo.com/ Watch full episodes of your favorite shows The Five: http://video.foxnews.com/playlist/longform-the-five/ Special Report with Bret Baier: http://video.foxnews.com/playlist/longform-special-report/ The Story with Martha Maccallum: http://video.foxnews.com/playlist/longform-the-story-with-martha-maccallum/ Tucker Carlson Tonight http://video.foxnews.com/playlist/longform-tucker-carlson-tonight/ Hannity http://video.foxnews.com/playlist/longform-hannity/ The Ingraham Angle: http://video.foxnews.com/playlist/longform-the-ingraham-angle/ Fox News @ Night: http://video.foxnews.com/playlist/longform-fox-news-night/ Follow Fox News on Facebook: https://www.facebook.com/FoxNews/ Follow Fox News on Twitter: https://twitter.com/FoxNews/ Follow Fox News on Instagram: https://www.instagram.com/foxnews/
Views: 474605 Fox News
How Does Radio Transmission Work? | Iken Edu
 
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How Does Radio Transmission Work? | Iken Edu In this animation script we will learn about Radio. For more videos visit https://www.youtube.com/ikenedu Follow us on twitter https://twitter.com/ikenedu Like us on https://www.facebook.com/ikenconnect
Views: 35087 Iken Edu
Hertz and Radio Waves Explained
 
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This video examines the experiment Hertz performed to validate Maxwell's prediction for electromagnetic waves. It also touches on his observation of the photoelectric effect. Prepared to help students doing the HSC in Australia, it is suitable in other juridictions as well. Please consider supporting - https://www.patreon.com/HighSchoolPhysicsExplained Find me on facebook - www.facebook.com/HighSchoolPhysicsExplained
How Does An Antenna Work? | weBoost
 
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*** It is with sadness that we share that Don, the person featured in this video, passed away in December 2017. Don was a Navy veteran and a valued member of our product engineering team since 2004. He will be greatly missed. Have you ever asked: How does an antenna work anyway? If you have, then you will want to watch this 4-minute video. We ask a guy who designs and tests antennas, Don with weBoost, how antennas work. In the video he explains how an antenna works and why. So whether you're just curious and want an answer to 'how do antennas work.' Or if you want a little background before shopping for the best antenna for your needs, this short video explanation by Don the Antenna Engineer is a good place to start. To learn more about signal boosters visit: https://www.weboost.com/us/ Subscribe to our channel to be in the know when we release our weekly videos. Including Tips, how-to and more. Read more on our blog: https://www.weboost.com/us/news/blog/how-does-an-antenna-work/
Views: 663732 weBoost
Portal 1: all radios and signals from Transmission Received
 
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The location of every single radio and signal, in a compact and handy video, to help you with the achievement. It starts counting at 0 instead of 1, sorry about that.
Sputnik 1 Satellite-1 Radio Signal
 
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Radio signal of the first earth satellite Sputnik 1 (USSR) The radio transmitter "Sputnik-1" (radio station D-200) radiated radio waves at two frequencies: 20,005 and 40,002 MHz, alternately (the sending of the signal by one transmitter corresponded to the pause of the other, the switching was performed by an electromechanical relay with a period of several tenths of a second).
Views: 16796 Sunrise Rec
Radio Wave and Communication in URDU Hindi
 
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Adeel Explains generation and transmission of Radio Waves.
Views: 17685 Takhti
Transmission Lines - Signal Transmission and Reflection
 
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Visualization of the voltages and currents for electrical signals along a transmission line. My Patreon page is at https://www.patreon.com/EugeneK
Radio Frequency Transmission Full Tutorial
 
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DOWNLOAD CODE HERE FREE: http://robotix.com.au/#/videos/94 LIBRARY LINK HERE: http://www.resistorpark.com/arduino-virtualwire-library-download/ Learn more about this tutorial here: https://www.instructables.com/id/433-MHz-RF-Links-Theory-Circuit-and-Program/ he video above explains the basic theory that relates to data transmission, namely how electromagnetic waves are generated by antennas and how they encode 1's and 0's. Non essential information for a hobbyist, but really interesting none the less. Component list: •1 X Arduino Uno •1 X 433MHz RF link pair •3 X LED •1 X Piezo Buzzer •1 X Push Button •1 X Resistor 330Ω •50cm Single Core Wire Equipment needed: Soldering Iron Observe the schematic and the completed circuit (video tutorial also available) Make sure you do ALL of the following: 1. Connect the module in the following manner Vcc pin connects to Arduino 5V GND to Arduino GND and DATA to Arduino Pin 12 2.The button connects to Arduino pin 2 and needs to be earthed 3. The antenna needs to be soldered onto the module. The antenna is 35cm long and soldered into an antenna slot in the transmitter module. 4. The antenna is to be straight if possible. Watch the video from time: 00:40 to see the circuit built from scratch -~-~~-~~~-~~-~- Latest and Best Arduino Playlist in Collaboratio with DFRobot: https://www.youtube.com/playlist?list=PL_92WMXSLe_86NTWf0nchm-EmQIwccEye -~-~~-~~~-~~-~-
Views: 57966 Robotix
How AM and FM Works
 
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Highly edited version of US Army training video (TF11-3482 - Frequency Modulation Part I: Basic Principles, 1964) on the basics of FM transmission. This also shows how AM works. For educational purposes for my students.
Views: 271758 Dana Lee
PROPAGATION OF ELECTROMAGNETIC WAVES PART 01
 
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For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, +91- 9100061777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. PROPAGATION OF ELECTROMAGNETIC WAVES:In communication using radio waves, an antenna at the transmitter radiates the Electromagnetic waves EM waves, which travel through the space and reach the receiving antenna at the other end. As the EM wave travels away from the transmitter, the strength of the wave keeps on decreasing. Several factors influence the propagation of EM waves and the path they follow. At this point, it is also important to understand the composition of the earth’s atmosphere as it plays a vital role in the propagation of EM waves. A brief discussion on some useful layers of the atmosphere is given in Table. Ground wave: To radiate signals with high efficiency, the antennas should have a size comparable to the wavelength of the signal at least /4. At longer wavelengths i.e., at lower frequencies, the antennas have large physical size and they are located on or very near to the ground. In standard AM broadcast, ground based vertical towers are generally used as transmitting antennas. For such antennas, ground has a strong influence on the propagation of the signal. The mode of propagation is called surface wave propagation and the wave glides over the surface of the earth. A wave induces current in the ground over which it passes and it is attenuated as a result of absorption of energy by the earth. The attenuation of surface waves increases very rapidly with increase in frequency. The maximum range of coverage depends on the transmitted power and frequency less than a few MHz. Sky waves:In the frequency range from a few MHz up to 30 to 40 MHz, long distance communication can be achieved by ionospheric reflection of radio waves back towards the earth. This mode of propagation is called sky wave propagation and is used by short wave broadcast services. The ionosphere is so called because of the presence of a large number of ions or charged particles. It extends from a height of ~65 Km to about 400 Km above the earth’s surface. Ionisation occurs due to the absorption of the ultraviolet and other high-energy radiation coming from the sun by air molecules. The ionosphere is further subdivided into several layers, the details of which are given in Table. The degree of ionisation varies with the height. The density of atmosphere decreases with height. At great heights the solar radiation is intense but there are few molecules to be ionised. Close to the earth, even though the molecular concentration is very high, the radiation intensity is low so that the ionisation is again low. However, at some intermediate heights, there occurs a peak of ionisation density. The ionospheric layer acts as a reflector for a certain range of frequencies 3 to 30 MHz.Electromagnetic waves of frequencies higher than 30 MHz penetrate the ionosphere and escape. These phenomena are shown in the Figure. The phenomenon of bending of EM waves so that they are diverted towards the earth is similar to total internal reflection in optics.
Views: 219021 7activestudio
How to build a FM radio transmitter
 
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Circuit & Component layout: 0:33 in the video Feel free to leave a comment if you have any questions or concerns. Music by: e-soundtrax Parts list: -Transistor 2N3904 -Trimmer capacitor 2-22pF -Electrolytic capacitors 2X 47uF -Ceramic capacitors 3X 1nF 10pF 33pF -Resistors 22k 39k 47k 100R -Wires -Copper wire (~0.5mm diameter) -Prototype board -Antenna (anything you like) -Audio plug -9V Battery clip -9V Battery Tools: -Soldering iron -Solder -Pocket knife -Cutting pliers -Mini pliers -Bolt (~5mm diameter) -Ruler -Lighter -Candle wax -Electrical tape The best and most productive way to gather the parts for this project is to take apart and salvage old and or broken electronics appliances. This may take some technical skill. The safest bet is to purchase a fresh set of parts and tools (if you don't have them) Here are a couple online web-stores which sell the parts and tools needed for this project: http://www.amazon.com/ - amazon has all the parts and tools needed for this project. However, amazon tends to sell electronics parts in large bulks which means you are likely to pay for parts needed to build around 100 of these transmitters. http://www.conrad.com/ce/ - One of the greatest electronics web- stores in western Europe. You can cheaply buy individual parts needed for this project. http://www.lemona.lv/index.php?lan=en&toc= - One of the best electronics web-stores in eastern Europe. You can buy the parts needed for this project at very low prices. https://www.radioshack.com/ - One of the most popular electronics web stores which ship worldwide and sell all of the components at low prices.
Views: 818075 Lukas Ekers
7078 Khz Strange Radio Signals
 
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Strange radio signals received on 7.078 Mhz on LSB. Can anyone identify this signal?
Views: 5373 Edmk2009
Russia's Ghost Radio Station: What is the Mysterious Sound Heard on UVB-76?
 
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No one knows for sure what is being heard when tuned into radio frequency 4625 kHz. Secret, coded messages sent across airwaves between governments and spies? A signal ready to sound an alarm? Or a mysterious transmission tuned to interact with the ionosphere? Known to be of Russian origin, though this has never been confirmed by the Russian government, the signal was a continuous broadcast of repeated pip that has since become an unsettling looping and buzzing tone. For decades, the source of the broadcast was entirely unknown, until suddenly and unexpectedly, the first spoken words on the station identified it as UVB-76, broadcast from a military bunker in Povarovo, a small town 19 miles outside of Moscow. This interruption was soon followed by new strange and unsettling additions: rustling of someone moving around nearby, a harsh voice reading a series of names and numbers, and faintly eerie music playing in the background… More Dark Docs: Fishing from Airplanes for Soviet Secrets: What was Skyhook - Operation Coldfeet? https://www.youtube.com/watch?v=dXmRYYjyKfE Why did Russia Abandon a Space Shuttle in the Desert? https://www.youtube.com/watch?v=HQIHSgpc0f0
Views: 592962 Dark Docs
send data over fm radio using raspberry pi
 
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in this project u will be able to send data over FM radio by sound usiing the raspberry pi as FM transmitter for more info: [email protected]
Views: 26752 karim shkeir
Why AM Radio Signals Propogate Farther At Night Than During the Day
 
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→Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 →How "Dick" came to be short for 'Richard': https://youtu.be/BH1NAwwKtcg?list=PLR0XuDegDqP2Acy6g9Ta7hzC0Rr3RDS6q Never run out of things to say at the water cooler with TodayIFoundOut! Brand new videos 7 days a week! More from TodayIFoundOut In this video: In this video, we're looking at why it is that some radio signals, like am radio, propagate much farther at night than during the day, allowing you to potentially pick up an am radio station sometimes even thousands of miles away from the broadcast source. Want the text version?: http://www.todayifoundout.com/index.php/2015/01/radio-signals-travel-night-day/ Sources: http://electronics.howstuffworks.com/radio4.htm http://electronics.howstuffworks.com/question1.htm http://en.wikipedia.org/wiki/Ionosphere http://en.wikipedia.org/wiki/AM_broadcasting http://www.fcc.gov/encyclopedia/why-am-radio-stations-must-reduce-power-change-operations-or-cease-broadcasting-night http://usatoday30.usatoday.com/news/science/wonderquest/2002-01-23-radio-waves.htm http://illumin.usc.edu/114/catch-a-wave-radio-waves-and-how-they-work/ http://www.cybercollege.com/frtv/frtv017.htm http://en.wikipedia.org/wiki/Skywave http://commons.wikimedia.org/wiki/File:Skywave_Effect_of_AM.png http://missionscience.nasa.gov/ems/03_behaviors.html Image Credit: https://commons.wikimedia.org/wiki/File:Skywave_Effect_of_AM.png http://apollo.lsc.vsc.edu/classes/met130/notes/chapter1/ion2.html http://radiojove.gsfc.nasa.gov/education/educ/radio/tran-rec/exerc/iono.htm https://en.wikipedia.org/wiki/File:Skywave.jpg https://commons.wikimedia.org/wiki/File:Amfm3-en-de.gif
Views: 17585 Today I Found Out
Transmit Radio Signals w/ Raspberry Pi (1/2) - Software Defined Radio Series #24
 
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In this video I show how to transmit radio signals with a Raspberry Pi! This video includes the complete steps from the beginning, where we format and reinstall the operating system (Raspbian), enable SSH access, upload audio files, install the necessary programs, and how to use them. NOTE: The Raspberry Pi produces a lot of harmonics, which is generally very bad in terms of RF tranmissions, as "duplicates" of the original signal will be seen at Frequency*2, Frequency*3, Frequency*4, etc. Hardware: - Raspberry Pi v3 Model B - Transmitter - Terratec E4000 RTL-SDR (RTL2832U) - Receiver Topics covered: - Formatting SD Cards Properly - Installing Raspbian - Enabling SSH (Now disabled by default since 30th November 2016!) -- https://www.raspberrypi.org/blog/a-security-update-for-raspbian-pixel/ - Uploading Files With FileZilla - Installing PiFmRds - Basic PiFmRds Usage Tools: - SD Formatter v4 https://www.sdcard.org/downloads/formatter_4/index.html - FileZilla https://filezilla-project.org/ - PiFmRds https://github.com/ChristopheJacquet/PiFmRds - SDR# (sdrsharp, http://airspy.com/download/ & https://github.com/jmichelp/sdrsharp-bladerf) - RPi TX https://github.com/F5OEO/rpitx -- https://github.com/F5OEO/rpitx/issues/21 -- https://github.com/F5OEO/rpitx/issues/25 Stay tuned and subscribe for more upcoming videos showing actual hacks! Many thanks to Adafruit for linking to this video! (https://blog.adafruit.com/2017/02/10/transmit-radio-signals-w-raspberry-pi/) Many thanks to the RTL-SDR.com Blog for featuring this video! ( http://www.rtl-sdr.com/video-tutorial-transmitting-signals-raspberry-pi/ ) Twitter: @CrazyDaneHacker Facebook: https://www.facebook.com/crazydanishhacker Patreon: https://www.patreon.com/crazydanishhacker
Views: 11686 Crazy Danish Hacker
How Radio  broadcast works
 
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How Radio broadcast works
Views: 37500 Daniel Izzo
Radio Signal of 'Black Knight Satellite' Transmission sent from Space?
 
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The following audio was played on Ground Zero with Clyde Lewis. It is a transmission signal that purports to be from the Black Knight Satellite. Of course there is no substantial proof for this claim but only theories. Let me know your theories and even your wildest theories to this purported signal in the description below. or if it is just simply a HOAX... ------------------------------------------------- HERE IS THE LINK TO THE RADIO SHOW. skip to 1 hour and 35 mins to here the signal he plays. -https://soundcloud.com/groundzeromedia/lords-of-the-air-w-chase-kloetzke-january-27-2017 ------------------------------------------------- DISCLAIMER]: Truth Perception Media does not necessarily agree or disagree with the information in the video. There is no scientific proof to the claims in this video. This video is for informational purposes for the audience to make their own conclusions about information within the video. This video was created and is presented with an open mind and does not prove anything. I leave the questions to the viewers to contemplate the claims within the video. Royalty Free License from audioblocks.com https://www.audioblocks.com All images remain copyright of their respective owners.
Transmit Radio Signals w/ Raspberry Pi (2/2) - Software Defined Radio Series #25
 
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In this video I demonstrate how rpitx can be used with a Raspberry Pi to transmit various other radio signals, and not just wideband FM. NOTE: The Raspberry Pi produces a lot of harmonics, which is generally very bad in terms of RF transmissions, as "duplicates" of the original signal will be seen at Frequency*2, Frequency*3, Frequency*4, etc. Hardware: - Raspberry Pi v3 Model B - Transmitter - Terratec E4000 RTL-SDR (RTL2832U) - Receiver Topics covered: - RPiTX Installation and Usage - Common Issues Tools: - SDR# (sdrsharp, http://airspy.com/download/ & https://github.com/jmichelp/sdrsharp-bladerf) - RPi TX https://github.com/F5OEO/rpitx -- https://github.com/F5OEO/rpitx/issues/21 -- https://github.com/F5OEO/rpitx/issues/25 Stay tuned and subscribe for more upcoming videos showing actual hacks! Many thanks to the RTL-SDR.com Blog for featuring this video! ( http://www.rtl-sdr.com/video-tutorial-transmitting-signals-raspberry-pi/ ) Twitter: @CrazyDaneHacker Facebook: https://www.facebook.com/crazydanishhacker Patreon: https://www.patreon.com/crazydanishhacker
Views: 4948 Crazy Danish Hacker
PROPAGATION OF ELECTROMAGNETIC WAVES _ PART 02
 
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For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. Sky waves:In the frequency range from a few MHz up to 30 to 40 MHz, long distance communication can be achieved by ionospheric reflection of radio waves back towards the earth. This mode of propagation is called sky wave propagation and is used by short wave broadcast services. The ionosphere is so called because of the presence of a large number of ions or charged particles. It extends from a height of ~65 Km to about 400 Km above the earth’s surface. Ionisation occurs due to the absorption of the ultraviolet and other high-energy radiation coming from the sun by air molecules. The ionosphere is further subdivided into several layers, the details of which are given in Table. The degree of ionisation varies with the height. The density of atmosphere decreases with height. At great heights the solar radiation is intense but there are few molecules to be ionised. Close to the earth, even though the molecular concentration is very high, the radiation intensity is low so that the ionisation is again low. However, at some intermediate heights, there occurs a peak of ionisation density. The ionospheric layer acts as a reflector for a certain range of frequencies 3 to 30 MHz.Electromagnetic waves of frequencies higher than 30 MHz penetrate the ionosphere and escape. These phenomena are shown in the Figure. The phenomenon of bending of EM waves so that they are diverted towards the earth is similar to total internal reflection in optics. Space wave: Another mode of radio wave propagation is by space waves. A space wave travels in a straight line from transmitting antenna to the receiving antenna. Space waves are used for line-of-sight LOS communication as well as satellite communication. At frequencies above 40 MHz, communication is essentially limited to line-of-sight paths. At these frequencies, the antennas are relatively smaller and can be placed at heights of many wavelengths above the ground. Because of line-of-sight nature of propagation, direct waves get blocked at some point by the curvature of the earth as illustrated in Figure. If the signal is to be received beyond the horizon then the receiving antenna must be high enough to intercept the line-of-sight waves.If the transmitting antenna is at a height hT, then you can show that the distance to the to the horizon dT is give where R is the radius of the earth approximately 6400 km.
Views: 108863 7activestudio
Mysterious radio signals from deep space detected - 2019
 
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Mysterious radio signals - detected mysterious radio signals from the depths of the earth. 2019 - Submission: mysterious radio signals have been detected coming from outside our galaxy michio kaku - mysterious radio signal from space. Il y a 1 heure - Proof of LIFE: Scientists record mysterious radio signals from deep space Radio telescope sounds · radio telescope homemade · radio telescope images · radio telescope documentary · radio telescope how it works · radio telescope diy radio signals detected in space approaching our direction... Scientists Are Still Perplexed By Source Of Mysterious Radio Waves From Space Stream Mysterious Radio Signals From Space by 98online from desktop or your mobile device If You Like What We Do And You Should Be Sure To LIKE & Subscribe. It Keeps Us From Having To Turn Tricks On Hollywood Boulevard Follow Us On Twitter : https://twitter.com/VidaLocaYT #Mysterious #Radio ----------------- SUPPORT OUR CHANNEL ----------------- Help #VidaLoca Make More Fresh Quality Content. Every Contribution Is Helpful, Big Or Small ------------------------------------------------------------------------
Views: 54909 Vida Loca
Radio - broadcasting and reception - Science
 
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This is a science video for Grade 10 students that explains radio broadcasting and reception. RADIO BROADCASTING AND RECEPTION Using the basic principles of radio and TV communication, radio communication is achieved through various stages which are explained as follows: a) PRODUCTION OF SOUND AND MODULATED WAVE: In a studio the song rendered by a person is converted into electrical signals using a microphone. These signals are in the audio frequency (AF) range. An oscillator circuit produces suitable rf carrier wave. b) RADIO TRANSMITTER: The audio signal and r f waves are combined in the modulator or transmitter. The modulated waves are fed to an antenna fixed on a tower. The transmitting antenna broadcasts the modulated rf waves into space. c) RADIO RECEIVER: The aerial of a radio receiver receives the modulated waves from different transmitting stations. The tuning circuit selects only desired signals. The detector cirxcuits extracts or demodulate the af signal which is fed to an amplifier. The amplified electrical signals are fed to a speaker and converted into music or speech.
Views: 13838 Elearnin
GCSE Physics Revision: Communication with waves
 
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GCSE Physics Revision: Communication with waves You can watch all my videos at www.freesciencelessons.co.uk In this video, we look at how we use waves for communication. We explore how radio waves can be used for radio signals and for terrestrial TV. We then explore how microwaves can be used for mobile telephones and satellite TV and finally we take a look at infra-red and visible light.
Views: 59566 Freesciencelessons
Radio signal sparks alien life speculation
 
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CNN's Anderson Cooper speaks with Miles O'Brien about a signal from a sun-like star, sparking speculation of alien life.
Views: 93698 CNN
Tesla vs. Marconi: Who Invented Radio - Decades TV Network
 
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Nikola Tesla gave a public demonstration of the wireless transmission of energy on March 1, 1893. He had created an induction coil to transmit and receive radio signals. Years later while he was preparing to transmit signals at a distance, so was another inventor: Guglielmo Marconi. Marconi transmitted the first transatlantic telegraph but Tesla had secured two radio patents in America. It became a story of fierce competition between two brilliant minds and a debate over who invented radio.
Views: 22570 Decades TV Network
Shortwave Radio Oddity Roundup
 
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Various recordings of shortwave radio oddities, numbers and noise stations. These mysterious broadcasts are found on shortwave bands and they are - or appear to be - with no definite purpose. These signals are said to actively haunt the airwaves after World War II at beginning of the Cold War. With the collapse of the Soviet Union many expect these stations to disappear overtime but radio monitors indicate these signals continue to exist with new ones surfacing every now and then along with stations that have operated for decades. So what are they? There are many speculations what these numbers stations are; theories point to covert government-sponsored broadcasts for spies abroad, illegal activities such as drug trafficking, for various scientific research and undisclosed military operations. However, to this day, no organization, broadcaster or country ever admitted the use of these stations. Video is made up of three parts: 1) Extinct or inactive stations 2) Rarity stations, special broadcasts or tests 3) Regular or active stations Yosemite Sam incident http://www.brogers.dsl.pipex.com/yosemite.html Buzzer, Pip and Squeeky Wheel http://www.astrosol.ch/53790397a40a2bb01/5379039f1a0a31204/index.html UVB-76/Buzzer http://www.brogers.dsl.pipex.com/page5.html http://deepthought.newsvine.com/_news/2010/06/06/4471630-uvb-76-the-buzzer-soviet-era-clandestine-transmitter http://www.youtube.com/watch?v=bqkE25mS0ZM More info, frequencies and schedules http://www.numbersoddities.nl/ http://www.brogers.dsl.pipex.com/page3.html http://priyom.org/ http://www.numbers-stations.com/node/4 http://www.apul64.dsl.pipex.com/enigma2000/
Views: 335944 Jonny Saiga
How to Make AM Radio Transmitter
 
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How to make an AM radio transmitter for use with a crystal radio or a normal AM radio. This simple circuit uses an oscillator chip and a transformer to take input from a sound source and turn it into radio waves, transmitted using an antenna. I test it with a CD player as the sound source but it may also work with an iPod or iPhone, though it may need some amplification for that. WARNING: Do not transmit more than 1 or 2 meters/yards otherwise you'll interfere with other radios. In many countries it is illegal to transmit without a license. For how to make the homemade crystal radio, watch "How to Make/Build a Crystal Radio": http://youtu.be/VqdcU9ULAlA For how to make the crystal earpiece watch "Make Crystal Earphone/Earpiece for Crystal Radio - Homemade": http://youtu.be/OVapqz4yBCY For how to make a lifter or ionocraft, watch "How to Make a Lifter": http://youtu.be/vzZy1Aqleno My webpage about how to make a simple AM radio transmitter: http://rimstar.org/science_electronics_projects/make_simple_am_radio_transmitter.htm Where to get a 1 megahertz oscillator chip and an audio transformer: https://www.scitoyscatalog.com/category/R.html Follow behind-the-scenes on: Twitter https://twitter.com/#!/RimStarz Google+ https://plus.google.com/116395125136223897621 http://rimstar.org Music used for background: The Path of the Goblin King Kevin MacLeod (incompetech.com) Licensed under Creative Commons: By Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ ISRC: USUAN1100873
Views: 272418 RimstarOrg
physics class 10 transmission of radio waves through space
 
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physics class 10 lecture 4 chapter 17
Views: 106 Syed Osama
How Long Does It Take for Radio Waves to Reach the Moon? : Lessons in Physics & Chemistry
 
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Subscribe Now: http://www.youtube.com/subscription_center?add_user=ehoweducation Watch More: http://www.youtube.com/ehoweducation A radio wave is just one type of electromagnetic radiation. Find out about how long it takes for radio waves to reach the moon with help from an experienced educator in this free video clip. Expert: Walter Unglaub Filmmaker: bjorn wilde Series Description: Physics plays a very important role in the world around us everyday, even if you don't necessarily realize it. Get tips on physics and chemistry with help from an experienced educator in this free video series.
Views: 4123 eHowEducation
Using a PC sound card to receive VLF radio signals
 
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Just connect an antenna to your computer's microphone input, and you can receive VLF (Very Low Frequency) radio signals! A sound card (or built-in sound chip) with a recording sampling rate of at least 96 kHz is recommended. Example of using this method to receive VLF signals from Russia and Europe: http://www.youtube.com/watch?v=fKSOoZ2vhvo SDR Sharp software (for Windows) to receive and record VLF (and many other) radio signals: http://sdrsharp.com/#download Similar SDR (Software Defined Radio) applications are available for Linux and Mac OS. Lists of VLF stations: http://sidstation.loudet.org/stations-list-en.xhtml http://www.smeter.net/stations/vlf-stations.php Common sources of radio interference and recommended solutions: http://www.ccrane.com/!wcjHVrOwu6BDBDjo39xwNw!/AM-Antennas About the accidental recording of VLF station GBR (16 kHz) contained on Mike Oldfield's "Tubular Bells" album: http://alancordwell.co.uk/personal/index.php http://gkircher.stormloader.com/vlfcd/ http://en.wikipedia.org/wiki/Rugby_Radio_Station
Views: 90173 VWestlife
Repeating radio signals coming from space (CNET News)
 
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Read the CNET News article - http://cnet.co/2wlYnnE Sign of life? Scientists discover an intriguing fast radio burst in a distant galaxy. Subscribe to CNET: http://cnet.co/2heRhep Check out our playlists: http://cnet.co/2g8kcf4 Like us on Facebook: https://www.facebook.com/cnet Follow us on Twitter: https://www.twitter.com/cnet Follow us on Instagram: http://bit.ly/2icCYYm Add us on Snapchat: http://cnet.co/2h4uoK3
Views: 51525 CNET
Raspberry Pi FM Radio Transmitter tutorial in Hindi | Hijack FM Radio Signals
 
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In this tutorial I will show you that how to build FM radio transmitter using Raspberry Pi 3? how to make pirate radio station using RPi 3? how to hijack FM radio stations using Raspberry pi? Hardware: RaspberryPi 3 B+ : https://amzn.to/2z3gzTp SanDisk 32GB Class 10 with adapter: https://amzn.to/2AsRXoW Software: https://www.raspberrypi.org/downloads/raspbian/ http://etcher.io/ http://angryip.org/ https://github.com/ChristopheJacquet/PiFmRds Warning and Disclaimer This video is an experimental & educational purpose only, In most countries, transmitting radio waves without a state-issued license specific to the transmission modalities (frequency, power, bandwidth, etc.) is illegal. Watch advance video tutorials- please visit https://techchip.net/products/ ▀▄▀▄▀▄ [ Follow Me on ] ▄▀▄▀▄▀ twitter: https://twitter.com/techchipnet facebook: https://facebook.com/techchip website:https://techchip.net Youtube: https://youtube.com/techchipnet Instagram: https://www.instagram.com/techchipnet/
Views: 6952 TechChip
Earhart's radio distress calls
 
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This excerpt from the 2010 Discovery Channel documentary Finding Amelia explains the post-loss radio distress calls that prove Earhart did not crash at sea.
Views: 146049 TIGHARchannel