Complementarity Principle

The Complementarity Principle, introduced by physicist Niels Bohr, states that certain properties of particles, like position and momentum, cannot both be precisely measured at the same time. Instead, these properties are complementary, meaning understanding one fully limits understanding of the other. It highlights that particles behave differently depending on how they are observed—sometimes acting like particles, other times like waves. This principle emphasizes the fundamental nature of quantum systems, where the behavior depends on measurement methods, and both perspectives are necessary for a complete description of quantum phenomena.