Radio - Wikipedia
WEBRadio 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.
History of radio - Wikipedia
WEBThe 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 …
Radio in the United States - Wikipedia
WEBv. t. e. 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 …
Invention of radio - Wikipedia
WEBInvention of radio. 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 …
Radio | Definition, History, & Facts | Britannica
WEBRadio, 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. Learn more about the history of radio in this article.
Timeline of radio - Wikipedia
WEBThe timeline of radio lists within the history of radio, the technology and events that produced instruments that use radio waves and activities that people undertook. Later, the history is dominated by programming and contents, which is closer to general history .
Radio broadcasting - Wikipedia
WEBRadio 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 by a satellite in Earth orbit.
AM broadcasting - Wikipedia
WEBAM broadcasting. AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands.
Radio - Simple English Wikipedia, the free encyclopedia
WEBUses of radio. Radio was first created as a way to send telegraph messages between two people without wires. Then two-way radio brought voice communication, including walkie-talkies and eventually mobile phones. Radio waves are still used to send messages between people. Talking to someone with a radio is different than "talk radio".
Category:Radio - Wikipedia
WEBThis category has the following 25 subcategories, out of 25 total. Radio by country (5 C) Radio by medium (2 C) Radio theme songs (20 P) Radio by period (4 C)
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