Question

what is foucault pendulum

Answer 1

A Foucault pendulum, or Foucault's pendulum, named after the French physicist Léon Foucault, was conceived as an experiment to demonstrate the rotation of the Earth; its action is a result of the Coriolis effect. It is a tall pendulum free to oscillate in any vertical plane and ideally should include some sort of motor so that it can run continuously rather than have its motion damped by air resistance.

Answer 2

Foucault's pendulum, named after the French physicist Léon Foucault, is a simple device conceived as an experiment to demonstrate the rotation of the Earth. Though it had been known that the Earth rotates, the introduction of the Foucault pendulum in 1851 was the first simple proof of the rotation. Today, Foucault pendulums are popular displays in science museums and universities