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":

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Windsor, Ontario - Culture and Tourism - Media
... 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 ... The CanCon requirements are sometimes blamed in part for the decline in popularity of Windsor radio station CKLW, a 50,000 watt AM radio station that in the late ...
Field Strength
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... XEMMM-AM, which began broadcasts in 1965, joined ESPN Radio in late 2002, replacing XETRA, which had changed from sports radio to adult standards some months earlier ... 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 ...
Telecommunications In Oman - Radio
... Broadcast 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 ...

Famous quotes containing the word radio:

    Denouement to denouement, he took a personal pride in the
    certain, certain way he lived his own, private life,
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    the bank foreclosed; nevertheless, the landlord called;
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    And twelve o’clock arrived just once too often,
    Kenneth Fearing (1902–1961)

    from above, thin squeaks of radio static,
    The captured fume of space foams in our ears—
    Hart Crane (1899–1932)

    Having a thirteen-year-old in the family is like having a general-admission ticket to the movies, radio and TV. You get to understand that the glittering new arts of our civilization are directed to the teen-agers, and by their suffrage they stand or fall.
    Max Lerner (b. 1902)