Gourt > Regional > Europe > Italy > News and Media > Radio
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 ]
Ujan yg aneh...wijaya ujan, radio dalam enggak, gandaria ujan...freak
Martarini (MartaRini) Sat, 12 Dec 2009 07:28:47 -0000
Ujan yg aneh...wijaya ujan, radio dalam enggak, gandaria ujan...freak
BIG UP TO MY STALKER WHO WANNA JOIN MY BLOG TALK RADIO MOVEMENT! We Truly Rich bitch! lmfao @ You
Only1EricaMena ( Erica Mena) Sat, 12 Dec 2009 07:28:44 -0000
BIG UP TO MY STALKER WHO WANNA JOIN MY BLOG TALK RADIO MOVEMENT! We Truly Rich bitch! lmfao @ You
Auch Radio-Streaming funzt auf dem Bold.Sogar ohne Software.So langsam gehen mir die Argumente für das iPhone aus.Einzig beim Webbrowser
A_x_el (Axel aus Hu'e) Sat, 12 Dec 2009 07:28:42 -0000
Auch Radio-Streaming funzt auf dem Bold.Sogar ohne Software.So langsam gehen mir die Argumente für das iPhone aus.Einzig beim Webbrowser
@hensel ik heb zelfs recent een paar volgers geskipt... werd gek van al die onnutte informatie en nieuws dat er ook op tv en radio is..
miekevanzundert (miekevanzundert) Sat, 12 Dec 2009 07:28:29 -0000
@hensel ik heb zelfs recent een paar volgers geskipt... werd gek van al die onnutte informatie en nieuws dat er ook op tv en radio is..
Wow I sounded like a radio announcer just there.
AshleighLiebtTH (Ashleigh Gray) Sat, 12 Dec 2009 07:28:28 -0000
Wow I sounded like a radio announcer just there.
Call In: Texas Hip Hop Artists Cashis Klay & 3-Kingz LIVE on The Kitty Williams Radio Show Today 12/12 @ 11:30am CS ... http://lnk.ms/3PrdN
MissKittyTV (MissKittyTV Networks) Sat, 12 Dec 2009 07:28:22 -0000
Call In: Texas Hip Hop Artists Cashis Klay & 3-Kingz LIVE on The Kitty Williams Radio Show Today 12/12 @ 11:30am CS ... http://lnk.ms/3PrdN
Mobilito - An independent wireless channel for Italian enthusiasts, providing local events information and news available exclusively via handheld organizer. Subscribe, advertise.
| 29/11/08 - Pulse Radio Culture Day (Blues & Royals FB) - Part 9 | |
| Next Video | |
