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Foucault

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Fou·cault  (f-k), Jean Bernard Léon 1819-1868.
French physicist who estimated the speed of light and determined that it travels more slowly in water than in air (1850). He also employed a pendulum to prove the rotation of the earth (1851) and invented the gyroscope (1852).
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Noun1.FoucaultFoucault - French physicist who determined the speed of light and showed that it travels slower in water than in air; invented the Foucault pendulum and the gyroscope (1819-1868)
Jean Bernard Leon Foucault


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From the 4th to the 6th of December inclusive, the weather remaining much the same in America, the great European instruments of Herschel, Rosse, and Foucault, were constantly directed toward the moon, for the weather was then magnificent; but the comparative weakness of their glasses prevented any trustworthy observations being made.
From The Earth To The Moon by Verne, Jules View in context
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