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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 ]
a very smart media dude, @markramseymedia, responds to yesterday's @nbcsandiego spot (on local radio) > http://bit.ly/5Uhcki
chriscantore (chris cantore) Tue, 05 Jan 2010 21:40:01 -0000
a very smart media dude, @markramseymedia, responds to yesterday's @nbcsandiego spot (on local radio) > http://bit.ly/5Uhcki
Aint even gonna bother now! lol thanks though! lol RT @rotoe31: @stevegiglio radio guy on ESPNradio1250.com ck his profile.
stevegiglio (Steve Giglio) Tue, 05 Jan 2010 21:40:00 -0000
Aint even gonna bother now! lol thanks though! lol RT @rotoe31: @stevegiglio radio guy on ESPNradio1250.com ck his profile.
is now playing "K-EDD Radio #1" by K-EDD Promo from "K-EDD Radio"
keddradio (KEDD Radio) Tue, 05 Jan 2010 21:39:56 -0000
is now playing "K-EDD Radio #1" by K-EDD Promo from "K-EDD Radio"
With so many unemployed people in America right now, playing "Money to Blow" over & fucking over again on the radio is mad disrespectful.
KittyCleopatra (KittyCleopatraâ¢) Tue, 05 Jan 2010 21:39:56 -0000
With so many unemployed people in America right now, playing "Money to Blow" over & fucking over again on the radio is mad disrespectful.
ohh I am dying, Bernie Mac on comedy radio... "you want some milk and cookies?" I bet my coworkers think I'm nuts, laughing at myself!
crickalou (Christen K) Tue, 05 Jan 2010 21:39:50 -0000
ohh I am dying, Bernie Mac on comedy radio... "you want some milk and cookies?" I bet my coworkers think I'm nuts, laughing at myself!
Me empiezo a ir rumbo a radio
marcosh (Marcos H.) Tue, 05 Jan 2010 21:39:50 -0000
Me empiezo a ir rumbo a radio
LZ1KSN - Amateur Radio Club Neftohimic, Bourgas
Mixx - Private station, broadcasting on 92.9 FM in Pomorie and 94.7 FM in Sliven, includes a profile, team photos, and top 20 chart.
Meta Description: [ Private radio stations, broadcasting on 92.9 FM in Pomorie and 94.7 FM in Sliven, Bulgaria. Format - CHR, contemporary hits. Learn more about us and our team, share your opinion or vote for your favorite songs on the website. ]
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