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" "To make a discovery is not necessarily the same as to understand a discovery. Not only Planck but also other physicists were initially at a loss as to what the proper context of the new postulate really was.
Abraham Pais (May 19, 1918 – July 28, 2000) was a Dutch-born American physicist and science historian. He served as an assistant to Niels Bohr in Denmark and was later a colleague of Albert Einstein at the Princeton Institute for Advanced Study. Pais wrote books documenting the lives of these two great physicists and the contributions they and others made to modern physics.
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"I introduce the subject of fine structure with a mini-calendar of events. ...
Winter 1914-15. Sommerfeld computes relativistic orbits for hydrogen-like atoms. Pashcen, aware of these studies, carefully investigates fine structures, ....
January 6, 1916. Sommerfeld announces his fine structure formula, citing results to be published by Paschen in support of his answer.
February 1916. Einstein to Sommerfeld: "A revelation!"
March 1916. Bohr to Sommerfeld: "I do not believe ever to have read anything with more joy than your beautiful work."
September 1916. Paschen publishes his work, acknowledging Sommerfeld's "indefatigable efforts.
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Promising steps have been made toward grand unification, the union of weak, electromagnetic, and strong interactions in one compact, non-Abelian gauge group. In most grand unifies theories the proton is unstable. News about the proton's fate is eagerly awaited at this time. Superunification, the union of all four forces, is the major goal. Some believe that it is near and that supergravity will provide the answer. Others are not so sure.