Science Source December 28, 2009 DVD
EN_00957730_2943
An illustration of Guglielmo Marconi (1874-1937), then aged 21, in his father's garden at Pontecchio, conducting early experiments with a transmitter which produced a spark between two balls, one connected to a metal plate suspended in the air, the other to one in the earth-- showing the receiving apparatus in the background. Marconi was Italian physicist, Nobel Laureate and developer of wireless telegraphy. Marconi came from a wealthy family, and was privately tutored. In 1894 he read about the radio waves of Hertz, and set about applying this theory to sending signals. Making his own instruments, Marconi managed to send messages in morse code over increasingly longer distances. He moved to England in 1898, by then sending signals over 20 miles. In 1901 he reached his crowning achievement, by sending a radio message across the Atlantic Ocean. For this he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun, and was given the title Marchese by the Italian Government.
2011-03-21
EAST NEWS
Science Source
NYPL/Science Source
bn2304
1,18MB
23cm x 35cm przy 300dpi
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