Fou|cault pendulum

Fou|cault pendulum
Fou|cault pendulum «foo KOH»,
a pendulum used by Foucault in 1851 to demonstrate the earth rotates on its axis. The plane of its swing slowly wheeled, a phenomenon explained only by the earth's rotation. The deviation is clockwise north of the equator, counterclockwise south of it, the rate varying with latitude.

Useful english dictionary. 2012.

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  • Foucault, Jean Bernard Léon — Fou·cault (fo͞o kōʹ), 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)… …   Universalium

  • Foucault — Fou|cault, Jean Ber|nard Lé|on (1819 68) a French scientist who studied the speed of light. He invented Foucault s Pendulum, an object that swings on a wire and shows how the Earth spins around. He also invented the ↑gyroscope …   Dictionary of contemporary English

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