Radio is a technology that uses electromagnetic waves to transmit audio and other signals wirelessly over long distances. A transmitter converts the audio into radio waves, which are then broadcast through an antenna. A receiver, such as a radio set, picks up these waves and converts them back into audible sound. Radio is used for a variety of purposes, including broadcasting music, news, and talk shows, as well as for communication in emergency services, aviation, and maritime industries. Its versatility and accessibility have made it a vital form of communication and entertainment for over a century.
