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Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light.
Radio waves
Radio waves are a form of electromagnetic radiation, created whenever a charged object (in normal radio transmission, an electron) accelerates with a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. In radio, this acceleration is caused by an alternating current in an antenna. Radio frequencies occupy the range from a few tens of hertz to a few hundred gigahertz.
| ELF - SLF - ULF/VF - VLF - LF/LW - MW - HF/SW - VHF - UHF - SHF - EHF Electromagnetic radio spectrum |
Electromagnetic spectrum and diagram of radio transmission of an audio signal.
Electromagnetic radiation travels (propagates) by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not require a medium of transport (such as the aether). When radio waves pass an electrical conductor, the oscillating electric or magnetic field (depending on the shape of the conductor) induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. The word 'radio' is used to describe this phenomenon, and television, radio, radar, and cell phone transmissions are all classed as radio frequency emissions.
More on [ Radio ]
World :: Stations
Radio :: Regional and Ethnic
Music :: Internet
Caribbean :: Regional
@0uvindo:Internet Radio - Combichrist - Deathbed (Vampirefreaks.com Radio: Jets Industrial / EBM Station).
oguela (moela) Sun, 20 Dec 2009 08:25:30 -0000
@0uvindo:Internet Radio - Combichrist - Deathbed (Vampirefreaks.com Radio: Jets Industrial / EBM Station).
Cathy Huges Has Several Radio Stations Across The Us. As A Woman She Has Worked Hard To Knock Down Prejudice. Toward Color And Female,
ShaaMomanger (Shaa Shaa) Sun, 20 Dec 2009 08:25:29 -0000
Cathy Huges Has Several Radio Stations Across The Us. As A Woman She Has Worked Hard To Knock Down Prejudice. Toward Color And Female,
Check this video out -- Bat for Lashes - Daniel (BBC Radio 1 Live Lounge) http://www.youtube.com/watch?v=PNEj7cnUzLE
Esteban1977 (Dimitris Pouranis) Sun, 20 Dec 2009 08:25:03 -0000
Check this video out -- Bat for Lashes - Daniel (BBC Radio 1 Live Lounge) http://www.youtube.com/watch?v=PNEj7cnUzLE
RT @jes2go: Don't forget. I'm on the radio in Monterey tomorrow 4pm PT / 7pm ET I'll post a live listen link tomorrow!
ShiCooks (Shire ) Sun, 20 Dec 2009 08:24:56 -0000
RT @jes2go: Don't forget. I'm on the radio in Monterey tomorrow 4pm PT / 7pm ET I'll post a live listen link tomorrow!
So bored nothing on tv nothing on radio
Monique_Star3 (monique horne) Sun, 20 Dec 2009 08:24:53 -0000
So bored nothing on tv nothing on radio
coming up next on #barix radio: music from Supertramp, Falco and Fergie. tune in now on http://tinyurl.com/y8mlrej!
barixradio (Barix Radio) Sun, 20 Dec 2009 08:24:38 -0000
coming up next on #barix radio: music from Supertramp, Falco and Fergie. tune in now on http://tinyurl.com/y8mlrej!
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