When did werner heisenberg make his discovery?

Werner Heisenberg made his groundbreaking discovery in 1925 when he formulated matrix mechanics, a fundamental framework for quantum mechanics. This work laid the foundation for understanding the behavior of subatomic particles. His most famous contribution, the Heisenberg Uncertainty Principle, was introduced in 1927, highlighting the inherent limitations in simultaneously knowing certain pairs of properties, such as position and momentum, of a particle.