Jean Bernard Léon Foucault (French pronunciation: â[ÊÉÌ bÉÊnaÊ leÉÌ fuko]) (18 September 1819 â 11 February 1868) was a French physicist best known for the invention of the Foucault pendulum, a device demonstrating the effect of the Earth’s rotation. He also made an early measurement of the speed of light, discovered eddy currents, and although he did not invent it, is credited with naming the gyroscope.
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