Braun
German physicist Ferdinand Braun's main contribution to solid state physics was ... In other words, Ferdinand Braun had discovered the point-contact rectifier effect. ...
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Ferdinand Braun - Biography
Karl Ferdinand Braun was born on June 6, 1850 at Fulda, where he was educated at ... Ferdinand Braun. Biography. Nobel Lecture. All Physics Nobel Laureates ...
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Karl Ferdinand Braun - Wikipedia, the free encyclopedia
Karl Ferdinand Braun (6 June 1850 in Fulda, Germany - 20 April 1918 in New York ... The Ferdinand-Braun-Institut fuer Hoechstfrequenztechnik Berlin, Germany ...
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OTB - "Forgotten" Pioneers of Wireless, Part 5 - Karl Ferdinand Braun
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Ferdinand Braun Biography
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Ferdinand Braun Cathode Ray Tube circa 1900
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Karl Ferdinand Braun: Biography from Answers.com
Karl Ferdinand Braun German physicist (1850-1918) Braun, who was born in Fulda , Germany, studied at Marburg and, in 1872, received a doctorate from
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Karl Ferdinand Braun. Born: 06 June 1850. Died: 20 April 1918. Karl Ferdinand Braun, German physicist and Nobel Prize winner was born on 6 June ...
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{{Infobox_Scientist| name = Karl Ferdinand Braun| image = Ferdinand Braun2.jpg|300px| image_width = 180px| caption = Ferdinand Braun| birth_date = | birth_place = Fulda, Hesse-Kassel, Germany, [New York| nationality = [Germany| field = Inventor and physicist| alma_mater = [University of Marburg
University of Berlin| doctoral_students = [Leonid Isaakovich Mandelshtam, [Cat's whisker diode (1909)| religion =| footnotes =-->

Karl Ferdinand Braun ([6 June 1850 in Fulda, Germany – 20 April 1918 in New York City, United States) was a Germany inventor, physicist and Nobel Prize in Physics laureate.

Biography Braun was educated at the University of Marburg and received a Ph.D from the University of Berlin in 1872. In 1874 he discovered that a point-contact semiconductor rectifier alternating current. He became director of the Physical Institute and professor of physics at the University of Strasbourg in 1895.

In 1897 he built the first Cathode ray tube oscilloscope. CRT technology is to this day used by most television sets and computer monitors. The cathode ray tube is still called the "Braun tube" (Braunsche Röhre) in German language-speaking countries (and in Japan: Buraun-kan).

During the History of radio, he also worked on wireless telegraphy. Around 1898, he invented a Diode or Cat's whisker diode. Guglielmo Marconi used Braun's patents (among others). Braun's British patent on tuning was used by Marconi in many of his tuning patents. Marconi would later admit to Braun himself that he had "borrowed" portions of Braun's work. In 1909 Braun shared the Nobel Prize for physics with Marconi for "contributions to the development of wireless telegraphy."

Braun went to the United States at the beginning of World War I to help defend the German wireless station at Sayville, N.Y. (on Long Island) against attacks by the British controlled Marconi Corporation. (At this time the U.S. had not yet entered the war). Braun died in his house in Brooklyn (New York City) before the war ended in 1918.

References 1. K.F. Braun: "On the current conduction in metal sulphides (title tranlated from German into English)", Ann. Phys. Chem., 153 (1874), 556. (In German)

2. Keller, Peter A.: The cathode-ray tube: technology, history, and applications. New York: Palisades Press, 1991. ISBN 0-9631559-0-3.

3. Keller, Peter A.: "The 100th Anniversary of the Cathode-Ray Tube," Information Display, Vol. 13, No. 10, 1997, pp. 28-32.

See also

• Radio: History of radio, Invention of radio
• People: Edouard Branly

External articles and references Patent

Other

• " Ferdinand Braun – Biography". Nobel Lectures. Physics 1901-1921, Elsevier Publishing Company, Amsterdam, 1967.
• Naughton, Russell, " Karl Ferdinand Braun, Dr : 1850 - 1918".
• " Karl Ferdinand Braun ". Biographies of Famous Electrochemists and Physicists Contributed to Understanding of Electricity.
• Rybak, James P., "Forgotten" Pioneers of Wireless; Part 5 - Karl Ferdinand Braun".
• " Karl Ferdinand Braun, 1850-1918". (German) ( English translation)
• The Ferdinand-Braun-Institut fuer Hoechstfrequenztechnik Berlin, Germany

{{Persondata] and physicist, [Hesse-Kassel, Germany, [New York-->