Today marks the 194th natal day of Léon Foucault , the Gallic physicist who used a pendulum to confirm the rotation of the Earth . Today’sGoogle Doodlepays protection .
The interactive scribble is based on the Foucault pendulum , a gimmick introduced in 1851 to confirm the long - hold assumption that the Earth spins on its axis .
Foucault ’s most famous pendulum lie of a 62 - pound ( 28 kg ) brass - coat lead bob with a 220 foot ( 67 meters ) long wire that hang from the dome of the Pantheon in Paris . This pendulum fill in a full rotary once every 32.7 hours , swinging clockwise at 11 grade per minute .
Google ’s pendulum doodle leave drug user to manipulate the practical swinging bob according to where on Earth they happen to be .
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