Radio

Radio is the wireless transmission of signals through free space by electromagnetic radiation of a frequency significantly below that of visible light, in the radio frequency range, from about 30 kHz to 300 GHz. These waves are called radio waves. Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space.

Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.

Read more about RadioEtymology, Processes, Communication Systems, Uses of Radio

Other articles related to "radio, radios":

Telecommunications In Oman - Radio
... stations AM 3, FM 9, shortwave 2 (1999) Radios 1.4 million (1997) In April, 2008, Nokia Siemens was appointed to replace parts of the existing radio network ...
Windsor, Ontario - Culture and Tourism - Media
... article Media in Windsor, Ontario Windsor is considered part of the Detroit television and radio market for purposes of territorial rights ... Due to this fact, and its proximity to Toledo and Cleveland, radio and television broadcasters in Windsor are accorded a special status by the Canadian Radio-television and ... part for the decline in popularity of Windsor radio station CKLW, a 50,000 watt AM radio station that in the late 1960s (prior to the advent of CanCon) had been the top-ra ...
Field Strength
... In radio frequency telecommunications, field strength is the magnitude of the received electromagnetic field which will excite a receiving antenna and thereby induce a ...
XESPN-AM - Recent History
... XEMMM-AM, which began broadcasts in 1965, joined ESPN Radio in late 2002, replacing XETRA, which had changed from sports radio to adult standards ... In 2009, ESPN Radio moved to sister FM station XHMORE while XESPN joined ESPN Deportes Radio ... ESPN Deportes Radio is now available in the San Diego-Tijuana border region on XESS-AM 620 ...
Ottumwa, Iowa - Media - Radio
... favorites Adult contemporary O-Town Communications 91.1 FM KICW Classical music / Iowa Public Radio University of Northern Iowa ...

Famous quotes containing the word radio:

    ... the ... radio station played a Chopin polonaise. On all the following days news bulletins were prefaced by Chopin—preludes, etudes, waltzes, mazurkas. The war became for me a victory, known in advance, Chopin over Hitler.
    Margaret Anderson (1886–1973)

    Now they can do the radio in so many languages that nobody any longer dreams of a single language, and there should not any longer be dreams of conquest because the globe is all one, anybody can hear everything and everybody can hear the same thing, so what is the use of conquering.
    Gertrude Stein (1874–1946)

    A bibulation of sports writers, a yammer of radio announcers, a guilt of umpires, an indigence of writers.
    Walter Wellesley (Red)