Léon Foucault

Léon Foucault was a French physicist best known for inventing the Foucault pendulum, which demonstrates Earth's rotation. The pendulum swings in a fixed direction while the Earth turns beneath it, allowing observers to see Earth's rotation directly. This experiment provided visual proof of Earth's rotation without relying solely on astronomical observations. Foucault's work helped improve understanding of Earth's movement and motion, and his experiments are still used today to illustrate fundamental concepts in physics and Earth's dynamics.