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1867 - RADIO
The radio is a telecommunication system that enables the transmission of signals through electromagnectic waves. In 1867, a Scottish physist named JC Maxwell, proposed the existence of electromagnetic waves. The theory was later approved by H.R Herz in 1887. In 1901, Marconi sent the first wireless message to America. -
1930 - TELEVISION
The television is a system that allows the remote transmission of sound and images at the same time. Television broadcasts started around 1930. The popularization of the television came in the 1950s-1960s.