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Hippolyte Fizeau

Hippolyte Fizeau
Born September 23, 1819
Paris
Died September 18, 1896
Venteuil
Nationality French
Fields Physics
Known for Doppler Effect
Fizeau-Foucault apparatus
Capacitor

Armand Hippolyte Louis Fizeau (September 23, 1819 – September 18, 1896), a French physicist, was born in Paris. His earliest work was concerned with improvements in photographic processes. Later, in association with J. B. L. Beaulieu, he engaged in a series of investigations on the interference of light and heat. In 1848, he predicted the redshifting of electromagnetic waves.[1] In 1849 he published the first results obtained by his method for determining the speed of light (see Fizeau-Foucault apparatus), and in 1850 with E. Gounelle measured the speed of electricity. Hippolyte in 1864 made the first suggestion that the "length of a light wave be used as a length standard".(Physics part 1 Resnick/Halliday pg.5)

He was involved in the discovery of the Doppler effect.[2]

In 1853 he described the use of the capacitor (then called the condenser) as a means to increase the efficiency of the induction coil. Subsequently he studied the thermal expansion of solids, and applied the phenomenon of interference of light to the measurement of the dilatations of crystals. He became a member of the Académie des Sciences in 1860 and of the Bureau des Longitudes in 1878. He died at Venteuil on September 18, 1896.

See also

References

  1. ^ Hellemans; Bryan Bunch (1988). The Timetables of Science. New York, New York: Simon and Schuster. pp. 317. ISBN 0671621300.  
  2. ^ Houdas, Y. (April 1991). "[Doppler, Buys-Ballot, Fizeau. Historical note on the discovery of the Doppler's effect]". Annales de cardiologie et d'angéiologie 40 (4): 209–13. PMID 2053764.  

This article incorporates text from the Encyclopædia Britannica, Eleventh Edition, a publication now in the public domain.

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