a pendulum consisting of a heavy weight on the end of a long wire hanging from a fixed point, of the kind invented by Jean Foucault to show that the earth is rotating: the pattern of the pendulum's swinging appears to be rotating to an observer
A simple pendulum suspended from a long wire and set into motion along a meridian. The plane of motion appears to turn clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere, demonstrating the axial rotation of the earth.
Origin of Foucault pendulumAfter Jean Bernard Léon Foucault.
(plural Foucault pendulums)
- Foucault's pendulum