Niels Bohr showed in 1913

When Niels Bohr showed in 1913 how a quantum theory might be able to explain the characteristic light emitted by different atoms, Einstein recognized that a great step had been taken. He later called Bohr's work "the highest form of musicality in the sphere of thought."

You can EXIT to a short biography of Bohr (Univ. of Sunderland).

Photograph by A. B. Lagrelius and Westphal,
courtesy AIP Emilio Segrè Visual Archives.
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