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In 1855 provided the first demonstration of wireless communication, and then in 1895 Guglielmo Marconi sent the first radio signal. Radio developed from wireless telegraphy towards the end of the 19th century. Spark transmitters made a crackling noise in the receiver, speech and music was not possible. When thermionic tubes became available in the early 20th century it was now possible to modulated the transmitter current via the output of a carbon granule microphone.
The first radio was invented in the year 1895. It was developed fully by a German scientist named Heinrich Hertz.
Although wireless telegraphy was demonstrated in 1894, it was Guglielmo Marconi who successful transmitted broadcast signals, rather than clicks, beginning in 1895.
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