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{{Short description|Danish physicist associated with atomic structure and quantum theory}}
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Latest revision as of 23:03, 24 May 2026


Niels Bohr
Bohr in 1922
Bohr in 1922
Born 7 October 1885
Copenhagen, Denmark
Died 18 November 1962
Copenhagen, Denmark


Known for Bohr model; complementarity; Copenhagen interpretation; correspondence principle
Awards Nobel Prize in Physics (1922)

Niels Henrik David Bohr (1885-1962) was a Danish theoretical physicist who made foundational contributions to atomic structure and quantum theory. He received the 1922 Nobel Prize in Physics for his work on the structure of atoms and the radiation emitted from them.

Atomic structure

Bohr introduced a model of the atom in which electrons occupy discrete stationary states and emit or absorb radiation when moving between allowed energy levels. The model explained important features of the hydrogen spectrum and helped connect spectroscopy with the emerging quantum theory.

Although later quantum mechanics replaced the old orbit picture, Bohr's work remains a central step in the history of energy levels, atomic transitions, and the quantum description of atoms.

Quantum theory

Bohr developed the correspondence principle, which connects quantum results with classical physics in suitable limits. He also argued for complementarity: the idea that quantum systems may require mutually exclusive experimental descriptions, such as wave and particle descriptions, to give a complete account of phenomena.

His Copenhagen institute became a major center for quantum physics, bringing together physicists such as Werner Heisenberg, Wolfgang Pauli, Paul Dirac, and many others.

References


Author: Harold Foppele