Radio
Radio is 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. It is the technology of signaling and communicating using radio waves, which are electromagnetic waves of frequency between 3 hertz (Hz) and 3,000 gigahertz (GHz). Radio broadcasting means the transmission of audio (sound) to radio receivers belonging to a public audience. The earliest radio stations were radiotelegraphy systems and did not carry audio. For audio broadcasts to be possible, electronic detection and amplification devices had to be incorporated.
The period between the late 1920s and the early 1950s is considered the Golden Age of Radio, during which comedies, dramas, variety shows, game shows, and popular music were broadcast. Radio has been a powerful force in American life, with over 95 percent of Americans listening to radio at least once a week.
Guglielmo Marconi is known as the father of radio, as he proved that communicating through radio waves was possible. The word "radio" is derived from the Latin word "radius," meaning "spoke of a wheel, beam of light, ray". Radio has evolved gradually and gained acceptance slowly, and it continues to evolve as it competes with other technologies to attract and hold an audience.
