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How far did the radio message between Clifden, Ireland, and Buenos Aires travel in 1910?
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Guglielmo Marconi
Italian physicist Guglielmo Marconi, shown here about 1908, invented a successful wireless telegraph (that is, a radio) in 1896.
In 1910, Guglielmo Marconi successfully received radio messages at Buenos Aires transmitted from Clifden, Ireland. This transmission covered a distance of approximately 9,650 km (6,000 miles) using a wavelength of about 8,000 metres (5 miles).1