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From about 1920 to 1945, radio developed into the first electronic mass medium, monopolizing “the airwaves” and defining, along with newspapers, magazines, and motion pictures, an entire generation of mass culture. About 1945 the appearance of television began to transform radio’s content and role.
Guglielmo Marconi (born April 25, 1874, Bologna, Italy—died July 20, 1937, Rome) was an Italian physicist and inventor of a successful wireless telegraph, or radio (1896). In 1909 he received the Nobel Prize for Physics, which he shared with German physicist Ferdinand Braun.
The first practical wireless radio communication system was developed in Italy by Guglielmo Marconi. Marconi built on the mathematics of physicist James Clerk Maxwell and the experiments of both Oliver Lodge and Heinrich Hertz to transmit experimental broadcasts from the lab he built in 1894 at his family’s country villa.
Reginald Aubrey Fessenden (born October 6, 1866, Milton, Canada East [now Quebec], Canada—died July 22, 1932, Hamilton, Bermuda) was a Canadian radio pioneer who on Christmas Eve in 1906 broadcast the first program of music and voice ever transmitted over long distances.
Its first radio commercial, broadcast on August 22, 1922, was a 15-minute real-estate ad offering apartments in Jackson Heights, Queens. But acceptance of radio advertising was slow, as broadcasters did not want to offend listeners.
KDKA in Pittsburgh, most often cited as the first radio outlet in the United States, had begun as the amateur station 8XK in 1916, but it was forced off the air in World War I. It reappeared on November 2, 1920, as a “commercial” voice-and-music…
Radio technology, transmission and detection of communication signals consisting of electromagnetic waves that travel through the air in a straight line or by reflection from the ionosphere or from a communications satellite.
Radio telescope, astronomical instrument consisting of a radio receiver and an antenna system that is used to detect radio-frequency radiation between wavelengths of about 10 meters (30 megahertz [MHz]) and 1 mm (300 gigahertz [GHz]) emitted by extraterrestrial sources.
Fleming’s discovery was the first step to the amplifier tube that in the early part of the 20th century revolutionized radio communication.
Golden Age of American radio, period lasting roughly from 1930 through the 1940s, when the medium of commercial broadcast radio grew into the fabric of daily life in the United States, providing news and entertainment to a country struggling with economic depression and war.