Leon Foucault!
About Him:)
Leon Foucault was physicist in the 1800s. He is best known for his invention the Foucault Pendulum. Leon was born, lived, and died in Paris France.
Leon's Studies:)
Leon Foucault was a physicist, meaning that he studied the nature of matter and motion. When he made the Foucault Pendulum, Leon was studying the Earths rotation. His pendulum was used to test the Earth's Rotation by using a large ball on a string attached to a string on a fixed point that swings and when the Earth has rotated enough, the ball will knock a domino over that is set up at a certain point in the swing.