Gourt > Computers > Programming > Languages > Frontier > 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 ]
RT @wolfeblog @jamestevens Family Preparedness Guide - Dec 15,2009 http://snipurl.com/tnsyh #preparedness #radio
Northlandfox (Northlandfox) Sat, 12 Dec 2009 23:04:27 -0000
RT @wolfeblog @jamestevens Family Preparedness Guide - Dec 15,2009 http://snipurl.com/tnsyh #preparedness #radio
RT @AngelicaCurves Thank god for iPods. Imagine tryin run listenin 2 the radio. Smh .. LOL..The radio is HORRIBLE..
WalkLess (Brandon ) Sat, 12 Dec 2009 23:04:25 -0000
RT @AngelicaCurves Thank god for iPods. Imagine tryin run listenin 2 the radio. Smh .. LOL..The radio is HORRIBLE..
bounce is on radio disney
stephany_noyes (stephany gonzalez) Sat, 12 Dec 2009 23:04:24 -0000
bounce is on radio disney
check out the legend he is! @bkanish on derby radio right now! http://derbyradio.us:9090
MurryPrincess (MurryPrincess) Sat, 12 Dec 2009 23:04:23 -0000
check out the legend he is! @bkanish on derby radio right now! http://derbyradio.us:9090
Bounce on Radio Disney ;) 'Thats ok we'll show you how to bounce..'
x__bethan (Bethan) Sat, 12 Dec 2009 23:04:22 -0000
Bounce on Radio Disney ;) 'Thats ok we'll show you how to bounce..'
Bounce on Radio Disney!!
Team_JB (Katie ) Sat, 12 Dec 2009 23:04:19 -0000
Bounce on Radio Disney!!
Radio Community Server - The community server for Radio UserLand. Sets up a home base, separate from radio.weblogs.com, for any number of people in your own Radio community.
Radio UserLand - An easy-to-use Weblog tool that runs on desktop.
500
Radio Userland Tools Directory - A directory of tools for Radio Userland which have been created by the user community.
RCSearch - Simple search engine for Radio Community Server.
| Taylor Swift guest at Ellen DeGeneres Show Oct/29 also performance of Tim McGraw | |
| Next Video | |
