Online Encyclopedia

MARIE CORNU

Online Encyclopedia
Originally appearing in Volume V07, Page 179 of the 1911 Encyclopedia Britannica.
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MARIE
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  ,
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ALFRED (1841—1902), French physicist, was born at Orleans on the 6th of March 1841, and after being educated at the Ecole Polytechnique and the Ecole
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des Mines, became in 1867 professor of experimental physics in the former institution, where he remained throughout his
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life . Although he made various excursions into other branches of
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physical science, undertaking, for example, with J . B . A . Bailie about 187o a repetition of Cavendish's experiment for determining the mean density of the earth, his
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original
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work was mainly concerned with
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optics and spectroscopy . In particular he carried out a classical redetermination of the velocity of
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light by A . H . L . Fizeau's method, introducing various improvements in the apparatus, which added greatly to the accuracy of the results . This achievement won for him, in 1878, the prix Lacaze and membership of the Academy of Sciences in France, and the Rumford medal of the Royal Society in England . In 1899, at the jubilee
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commemoration of
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Sir George Stokes, he was Rede lecturer at Cambridge, his subject being the undulatory theory of light and its influence on
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modern physics; and on that occasion the honorary degree of D.Sc. was conferred on him by the university . He died at Paris on the 11th of
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April 1902 .

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