The famous physicist known for the uncertainty principle is Werner Heisenberg. Introduced in 1927, the principle posits that certain pairs of physical properties, like position and momentum, cannot be simultaneously measured with arbitrary precision. This concept fundamentally challenged classical physics and contributed to the development of quantum mechanics. Heisenberg's work revolutionized our understanding of atomic and subatomic particles, leading to advancements in technology and further exploration of the quantum realm. His contributions continue to influence various scientific fields, making him one of the most significant figures in 20th-century physics.