The invention of the radio changed the world. Guglielmo Marconi invented the radio. He was an Italian inventor. He discovered how to send radio signals by using invisible electric wires. Seven years later he was able to send radio signals halfway around the world.
Radio is the technology of using radio waves to carry information, such as sound - by systematically modulating properties of electromagnetic energy waves transmitted through space.
A radio communication system requires a transmitter and a receiver each having an antenna and appropriate terminal equipment such as a microphone at the transmitter and a loudspeaker at the receiver in the case of a voice-communication system,.
M. Tharik Fathima Ameera,
CP/GP St. Andrew’s Balika Maha Vidyalaya,
Nawalapitiya.