Correspondence principle
Physics principle formulated by Niels Bohr / From Wikipedia, the free encyclopedia
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In physics, a correspondence principle is any one of several premises or assertions about the relationship between classical and quantum mechanics. The physicist Niels Bohr coined the term in 1920[1] during the early development of quantum theory; he used it to explain how quantized classical orbitals connect to quantum radiation.[2] Modern sources often use the term for the idea that the behavior of systems described by quantum theory reproduces classical physics in the limit of large quantum numbers: for large orbits and for large energies, quantum calculations must agree with classical calculations.[3] A "generalized" correspondence principle refers to the requirement for a broad set of connections between any old and new theory.