Called a Foucault (pronounced “foo-KOH”) pendulum after its designer, French physicist Léon Foucault, the device was conceived in 1851 to demonstrate the rotation of the Earth. This pendulum ...

In 1851, scientist Leon Foucault installed the Foucault pendulum within the building to demonstrate the rotation of the Earth. The pendulum was removed and replaced a number of times, and a ...

French physicists Armand-Hippolyte-Louis Fizeau and Jean-Bernard-Leon Foucault were the two men who made it happen. The son of a physicist, physician, and professor of medicine, Fizeau was born in ...