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en.wikipedia.org/wiki/Radio

Radio is the technology of signalling or communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by a radio receiver connected to another antenna. Radio is very widely used in modern technology ...

www.answers.com/Q/What_year_did_the_radio_come_out

, it was 8XK of KDKA Radio on November 2, 1920 out of East Pittsburgh. If you mean the first radio station as in first to be used to send and receive radio waves, this was created in 1864 by James ...

didyouknow.org/history/radiohistory

Home » history » The history of radio. The history of radio. Twenty years after the telephone was invented and music was first sent down a telephone line, Guglielmo Marconi sent radio signals.. Marconi (1874-1937) was born in Italy and studied at the University of Bologna.

en.wikipedia.org/wiki/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".Later radio history increasingly involves matters of broadcasting

www.thoughtco.com/invention-of-radio-1992382

The term "radio" can refer to either the electronic appliance that we listen with or to the content that plays from it. In any case, it all started with the discovery of radio waves—electromagnetic waves that have the capacity to transmit music, speech, pictures, and other data invisibly through the air.

xroads.virginia.edu/~ug00/3on1/radioshow/1920radio.htm

Families gathered around their radios for night-time entertainment. As radio ownership increased, so did the number of radio stations. In 1920, KDKA was not actually the only operating radio station, but it remains a benchmark in most accounts. And by 1922, 600 radio stations had sprung up around the United States.

www.cybercollege.com/frtv/frtv020.htm

The Dawn Of FM Radio The story of FM radio is one of success and tragedy.. In the mid-30s, Major Edwin Armstrong, an inventor who had already devised a successful circuit to improve AM radio, came up with a whole new approach to transmitting radio signals. Armstrong was clearly a technical genius. Although his life was cut short, he's still considered the most prolific inventor in radio's ...

www.caranddriver.com/.../a15128476/the-history-of-car-radios

1952: First Radio With FM. AM was the undisputed king of the airwaves in 1952, but that didn’t stop Blaupunkt from introducing the first in-car FM radio.

www3.northern.edu/wild/th100/tv.htm

A Nipkow Disk: 1884: Paul Gottlieb Nipkow (1860-1940), a German university student, patents (German Patent #30105) the concept for an electro-mechanical television system. This system, which becomes the basis of the television experiments of the 1920s and early 30s, uses a rotating scanning-disk (known as a Nipkow disk) with a series of 30 holes, in a pattern which spirals from the edge of the ...

mentalfloss.com/.../when-car-radio-was-introduced-people-freaked-out

Arguing the other side was the Radio Manufacturers Association, who pointed out that car radios could be used to warn drivers of inclement weather and bad road conditions, as well as keeping them ...