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  2. 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

    Etymology

    The 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

    Electromagnetic waves were predicted by James Clerk Maxwell in his 1873 theory of electromagnetism, now called Maxwell's equations, who proposed that a coupled oscillating electric field and magnetic field could trave… See more

    Technology

    Radio waves are radiated by electric charges undergoing acceleration. They are generated artificially by time-varying electric currents, consisting of electrons flowing back and forth in a metal conductor called an antenna… See more

     
  1. History of radio - Wikipedia

  2. Radio | Definition, History, & Facts | Britannica

  3. Rádiózás – Wikipédia

  4. 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 …

  5. 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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  7. 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, …

  8. Radio - Simple English Wikipedia, the free encyclopedia

  9. 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.

  10. Internet radio - Wikipedia