A radio wave is a signal. Something that transmits information. Radio waves are divided into bands: from sub-millimeter to ultra-long.
Wired radio broadcasting
This type of broadcasting is the same kind of radio signal transmission to a large range of geographically dispersed listeners.
Peculiarities of broadcasting on the air
Radio transmitters transmit information at a certain frequency of electromagnetic radiation. Such a radio transmitter and its accompanying equipment
Digital terrestrial radio broadcasting
More than a hundred years have passed since the world’s first radio program was broadcast from Brant Rock Station (USA) in 1906.