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See also:FIZEAU, ARMAND HIPPOLYTE See also:- LOUIS
- LOUIS (804–876)
- LOUIS (893–911)
- LOUIS, JOSEPH DOMINIQUE, BARON (1755-1837)
- LOUIS, or LEWIS (from the Frankish Chlodowich, Chlodwig, Latinized as Chlodowius, Lodhuwicus, Lodhuvicus, whence-in the Strassburg oath of 842-0. Fr. Lodhuwigs, then Chlovis, Loys and later Louis, whence Span. Luiz and—through the Angevin kings—Hungarian
LOUIS (1819–1896) , See also:French physicist, was See also:born at See also:Paris on the 23rd of See also:September 1819. His earliest See also:work was concerned with improvements in photo-graphic processes; and then, in association with J. B. L. See also:Foucault, he engaged in a See also:series of investigations on the interference of See also:light and See also:heat. In 1849 he published the first results obtained by his method for determining the See also:speed of See also:propagation of light (see LIGHT), and in 185o with E. Gounelle measured the velocity of See also:electricity. In 1853 he described the employment of the See also:con-denser as a means for increasing the efficiency of the See also:induction-coil. Subsequently he studied the expansion of solids by heat, and applied the phenomena of interference of light to the measurement of the dilatations of crystals. He died at Venteuil on the 18th of September 1896. He became a member of the French See also:Academy in 186o and of the See also:Bureau See also:des Longitudes in 1878.
End of Article: FIZEAU, ARMAND HIPPOLYTE LOUIS (1819–1896)
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