Word: bohr
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Dates: during 1930-1939
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...Physics"?a picture he has displayed to some 300,000 readers in thin, lucid books. Sir James again led his hearers over the trail from the comfortable Victorian universe of jelly-like ethers, billiard-ball particles, gears and levers to the disconcerting, fantastic universe built by Rutherford, Planck. Bohr, Einstein. Heisenberg. Schrodinger, Dirac and others where the electron dances beyond space and time in a field of mathematical formulae...
...stands Albert Einstein. From his special theory (1905) and general theory (1915) spring a line of relativity logicians who include notably Max Born (currently a refugee from Nazi Germany) and Belgium's Abbe Georges Lemaitre. At the other end of theoretical analysis, Denmark's Niels Bohr has taken the quantum principle advanced by Germany's Max Planck and used it to describe the possible energy states of orbital electrons...
...little symbol e representing a quantum began seriously to restrict the old free & easy mechanics. Nevertheless the work of reconciliation began. Denmark's Niels Bohr ingeniously yoked classical laws and quantum laws to predict the probable interorbital jumps of electrons. His famed Correspondence Principle was postulated in 1913, was later abandoned when it was found not to work for atoms having more than one electron...
...orbital electrons may now both be calculated. The Uncertainty Principle advanced six years ago by Professor Werner Heisenberg held that the position or velocity of a given electron might be observed, never both. It has been widely accepted by theorists ever since, was reiterated last June by Niels Bohr at the American Association for the Advancement of Science meeting in Chicago...
...Professor Bohr's reiteration was in connection with his new theory of Complementarity-a dualistic doctrine of despair which holds that all phenomena have two aspects, like the convexity and concavity of a sphere, and that both aspects cannot be true at the same time...