Foucault's pendulum in the Pantheon, Paris, 1851 (1887). Artist: Unknown

Foucault's pendulum in the Pantheon, Paris, 1851 (1887). Artist: Unknown

1-152-003 - Ann Ronan Picture Library/Heritage-Images

Foucault's pendulum in the Pantheon, Paris, 1851 (1887). Jean Bernard Leon Foucault used this pendulum to demonstrate both the rotation of the Earth and the concept of inertia.

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