Braun, (Karl) Ferdinand (1850–1918)
German physicist who shared the 1909 Nobel Prize in Physics with Guglielmo
Marconi for his discovery that certain crystals
could act as rectifiers, and for his proposal
that these could be used in (crystal-set) radios and wireless telegraphy.
From 1895, Braun was professor pf physics and director of the Physical Institute,
Strasbourg. In 1897 he invented the oscilloscope,
using a cathode-ray tube known
as the Braun tube, the forerunner of the television tube.
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