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In 1884, Nikola Tesla invented the tesla coil, which he used to send and receive radio waves.
In 1896, Marconi sent Morse code radio signals which spread 4 miles.
In 1901, Marconi transmitted the first telegraph across the Atlantic Ocean. -
Hertz proved hat electric waves could be transmitted wirelesly.
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In 1896, Marconi sent Morse code radio signals which spread 4 miles.
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In, 1901 Marconi sent the first telegraph across the Atlantic Ocean
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