Radio

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 the waves.

Extends: Radio, [British inventions](https://wikipedia.org.ai/British inventions), [Italian inventions](https://wikipedia.org.ai/Italian inventions), [Media formats](https://wikipedia.org.ai/Media formats), [Promotion and marketing communications](https://wikipedia.org.ai/Promotion and marketing communications)