Evangelista Torricelli

Evangelista Torricelli was a 17th-century Italian physicist and mathematician best known for inventing the barometer, an instrument that measures atmospheric pressure. His work demonstrated that air has weight and can exert pressure, helping scientists understand weather patterns and the concept of vacuum. Torricelli's experiments with mercury in a tube led to the discovery of the principles behind atmospheric pressure and the existence of a vacuum, significantly advancing physics and meteorology. His contributions laid the foundation for modern techniques of measuring air pressure and understanding the behavior of gases.