The Foucault Pendulum - http://imgur.com/gallery/gV6Ivjd

Foucault_pendulum_animated.gif




The Foucault pendulum or 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. While it had long been known that the Earth rotates, the introduction of the Foucault pendulum in 1851 was the first simple proof of the rotation in an easy-to-see experiment. Today, Foucault pendulums are popular displays in science museums and universities.

The first public exhibition of a Foucault pendulum took place in February 1851 in the Meridian of the Paris Observatory.

http://en.wikipedia.org/wiki/Foucault_pendulum



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