Jean Bernard Léon Foucault (1819 - 1868) was a French physicist perhaps 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, invented a way to check that a telescope
mirror is correctly shaped, discovered eddy currents, and although he didn't invent it, is
credited with naming the gyroscope.
The Foucault crater on the Moon is named after him.
One of the Famous People on this site.
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