Jean Foucault

Jean FoucaultIn existographies, Jean Foucault (1819-1868) (IQ:160|#495), or “Leon Foucault” (Ѻ), was a French physicist, noted for []

In 1851, Foucault, in order to prove Nicolaus Copernicus’ 1514 assertion that the earth rotates, on its axis, once every 24 hours, built his famous 200-foot long swinging pendulum, shown below:

Foucault pendulum

which shows that when the pendulum circled clockwise, it returned to its original spot after twenty-four hours.

Quotes | By
The following are quotes by Foucault:

“You are invited to come to see the earth turn, tomorrow, from three to five, at Meridian Hall of the Paris Observatory.”
— Jean Foucault (1851), Invitation cards which he sent out to the scientists of Paris, to witness his famous pendulum experiment, Feb 3

External links
Jean Foucault – Wikipedia.

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