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Radio is the technology of communicating using radio waves. [1] [2] [3] Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves.
- Radio (Disambiguation)
Films. Radio, an American film about James "Radio" Kennedy...
- Radio Receiver
The most familiar form of radio receiver is a broadcast...
- Talk
Radio portal; This article is within the scope of...
- Drones
The radio signal from the operator side can be issued from...
- History
History of radio. The early history of radio is the history...
- Invention
A French ship-to-shore radio station in 1904. The invention...
- Radio in the United States
Radio broadcasting has been used in the United States since...
- Radio broadcasting
Broadcasting tower in Trondheim, Norway. Radio broadcasting...
- Timeline
1898: Marconi opened the first radio factory, on Hall...
- Radio (Disambiguation)
History of radio. The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy".
Radio broadcasting has been used in the United States since the early 1920s to distribute news and entertainment to a national audience. In 1923, 1 percent of U.S. households owned at least one radio receiver, while a majority did by 1931 and 75 percent did by 1937. [1] [2] It was the first electronic "mass medium" technology, and its ...
Learn about the origins, development, and impact of radio as a form of mass media and sound communication. Explore the history of radio broadcasting around the world, from early experiments to modern services.
- 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 sta...
- Was radio used in World War I?Efforts were made to use radio in World War I, but the technology proved unreliable. Wireless sets were available in battlefield trenches, where th...
- Where are radio waves located on the electromagnetic spectrum?Radio waves are located at the low-frequency end of the electromagnetic spectrum, beneath gamma rays, X-rays, ultraviolet light, visible light, inf...
- Where was radio invented?The first practical wireless radio communication system was developed in Italy by Guglielmo Marconi. Marconi built on the mathematics of physicist...
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A French ship-to-shore radio station in 1904. The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection. These developments allowed Guglielmo Marconi ...
Broadcasting tower in Trondheim, Norway. Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast ...
1898: Marconi opened the first radio factory, on Hall Street, Chelmsford, England, employing around 50 people. 1899: Bose announced his invention of the "iron-mercury-iron coherer with telephone detector" in a paper presented at Royal Society, London. 1899: Tesla experiments with wireless power in Colorado Springs.
