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.
Radio broadcasting - Wikipedia
WEBThis article is about audio signals. For video signals, see Over-the-air television. 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.
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 - 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".
Radio - Broadcasting, Technology, Music | Britannica
WEBRadio - Broadcasting, Technology, Music: Building on its wartime experience, radio expanded exponentially after 1945, with many countries adding new languages and services and a number of fairly small nations playing a prominent role on the air.
National Public Radio - Simple English Wikipedia, the free …
WEBNational Public Radio (NPR) is an American non-profit media organization headquartered in Washington, D.C., with its NPR West headquarters in Culver City, California. It serves as a national syndicator to a network of over 1,000 public radio stations in the United States.
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