Radio - Wikipedia
Radio is the technology of communicating using radio waves. 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 oscillating electrical energy, often characterized as a wave. They can be received b… See more
EtymologyThe word radio is derived from the Latin word radius, meaning "spoke of a wheel, beam of light, ray". It was first applied to communications in 1881 when, at the suggestion of French scientist Ernest Mercadier [… See more
History of radio - Wikipedia
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". Later radio history increasingly involves matters of broadcasting.
Wikipedia · Text under CC-BY-SA licenseRadio | Definition, History, & Facts | Britannica
- Radio is sound communication by radio waves, usually through the transmission of music, news…
Was radio used in World War I? - Efforts were made to use radio in World War I, but the technology proved unreliable. Wireless s…
Where are radio waves located on the electromagnetic spectrum?
- Radio is sound communication by radio waves, usually through the transmission of music, news…
Rádiózás – Wikipédia
Pontos megegyezés nincs azt illetően, hogy ki volt a rádió feltalálója. Nikola Tesla, Guglielmo Marconi és Alekszandr Popov egymástól függetlenül találták fel a szikratávírót (Marconi Tesla …
Radio broadcasting - Wikipedia
Learn about the history, types, and uses of radio broadcasting, the transmission of audio by radio waves to a public audience. Find out how radio waves are modulated, encoded, and received, and how radio stations are classified and …
Radio in the United States - Wikipedia
Learn about the history, regulation and services of radio broadcasting in the U.S., from AM and FM to shortwave and Internet. Find out how radio has evolved from a mass medium to a niche medium and how it is used for news, …
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Invention of radio - Wikipedia
Learn about the history and development of radio communication, from early theories and experiments to wireless telegraphy and telephony. Explore the contributions of scientists and inventors such as Hertz, Marconi, Fessenden, …
Radio - Simple English Wikipedia, the free encyclopedia
Learn about radio, a way to send electromagnetic signals over a long distance, to deliver information from one place to another. Find out the history, uses, and types of radio, and how …
Timeline of radio - Wikipedia
Learn about the history of radio, from its origins and developments to its applications and events. Explore the milestones and discoveries of scientists and inventors who contributed to the field of radio.
Internet radio - Wikipedia
An Internet radio studio. Internet radio, also known as Online radio, web radio, net radio, streaming radio, e-radio and IP radio, is a digital audio service transmitted via the …