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Radio, Electromagnetic radiation of lower frequency (hence longer wavelength) than visible light or infrared radiation, and consisting of the range of frequencies used for navigation signals, AM and FM broadcasting, television transmissions, cell-phone communications, and various forms of radar.

What is radio? Radio is sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of individual listeners equipped with radio receivers.

Radio, a form of mass media and sound communication by radio waves, usually through the transmission of music, news, and other types of programs from single broadcast stations to multitudes of individual listeners equipped with radio receivers.

A short definition for "radio" The first electronic mass medium of communication, involving an audio signal broadcast wirelessly in the form of radio waves from a high-power transmitter to a low-power receiver (radio set). Radio shares many of its representational and institutional characteristics with television.

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 3,000 gigahertz (GHz).

Types of Radios AM Radio. AM radio stands for amplitude modulation, and it's one of the oldest types of wireless broadcasting. ... FM Radio. Many people who listen to the radio in their car listen to FM radio. ... Shortwave Radio. ... Satellite Radio. ... Ham Radio. ... Walkie-Talkie.

Radio involves the process by which messages are sent through electrical waves. Radio can also be seen as a medium used for sending and receiving messages through the air using electronic waves.

In 1895, a young Italian named Gugliemo Marconi invented what he called ?the wireless telegraph? while experimenting in his parents' attic. He used radio waves to transmit Morse code and the instrument he used became known as the radio.

These include all devices that use radio waves for communication, including two-way radios (of course), radio broadcast, television broadcast, cordless telephones, cellular telephones, microwave links in the telephone network, satellites, garage door openers, and countless other devices.

The prime purpose of radio is to convey information from one place to another through the intervening media (i.e., air, space, nonconducting materials) without wires. Besides being used for transmitting sound and television signals, radio is used for the transmission of data in coded form.