Today in History- December 12th
MARCONI SENDS FIRST ATLANTIC WIRELESS TRANSMISSION:
December 12, 1901
Italian physicist and radio pioneer Guglielmo Marconi succeeds in sending the
first radio transmission across the Atlantic Ocean, disproving detractors who
told him that the curvature of the earth would limit transmission to 200 miles
or less. The message--simply the Morse-code signal for the letter "s"--traveled
more than 2,000 miles from Poldhu in Cornwall, England, to Newfoundland, Canada.
Born in Bologna, Italy, in 1874 to an Italian father and an Irish mother,
Marconi studied physics and became interested in the transmission of radio waves
after learning of the experiments of the German physicist Heinrich Hertz. He
began his own experiments in Bologna beginning in 1894 and soon succeeded in
sending a radio signal over a distance of 1.5 miles. Receiving little
encouragement for his experiments in Italy, he went to England in 1896. He
formed a wireless telegraph company and soon was sending transmissions from
distances farther than 10 miles. In 1899, he succeeded in sending a transmission
across the English Channel. That year, he also equipped two U.S. ships to report
to New York newspapers on the progress of the America's Cup yacht race. That
successful endeavor aroused widespread interest in Marconi and his wireless
company.Marconi's greatest achievement came on December 12, 1901, when he
received a message sent from England at St. John's, Newfoundland. The
transatlantic transmission won him worldwide fame. Ironically, detractors of the
project were correct when they declared that radio waves would not follow the
curvature of the earth, as Marconi believed. In fact, Marconi's transatlantic
radio signal had been headed into space when it was reflected off the ionosphere
and bounced back down toward Canada. Much remained to be learned about the laws
of the radio wave and the role of the atmosphere in radio transmissions, and
Marconi would continue to play a leading role in radio discoveries and
innovations during the next three decades.In 1909, he was jointly awarded the
Nobel Prize in physics with the German radio innovator Ferdinand Braun. After
successfully sending radio transmissions from points as far away as England and
Australia, Marconi turned his energy to experimenting with shorter, more
powerful radio waves. He died in 1937, and on the day of his funeral all British
Broadcasting Corporation (BBC) stations were silent for two minutes in tribute
to his contributions to the development of radio.
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