EINSTEIN, Albert. ''Strahlungs-Emission und - Absorption nach der Quantentheorie.'' Offprint from: Verhandlungen der Deutschen Physikalischen Gesellschaft. XVIII, Nr. 13/14. Braunschweig: Vieweg, 1916.
EINSTEIN, Albert. "Strahlungs-Emission und - Absorption nach der Quantentheorie." Offprint from: Verhandlungen der Deutschen Physikalischen Gesellschaft. XVIII, Nr. 13/14. Braunschweig: Vieweg, 1916.
8o. Original printed wrappers. Provenance: Michele Besso (1873-1955) with his annotations in several places.
FIRST EDITION, AUTHOR'S PRESENTATION OFFPRINT ISSUE, with the printed caption "Überreicht vom Verfasser." ANNOTATED BY EINSTEIN'S CLOSE FRIEND MICHELE BESSO. Einstein's new derivation of Planck's Quantum Theory, published 16 years after Planck had first published his paper. "When Einstein returned to the radiation problem in 1916, the quantum theory had undergone a major change. Niels Bohr's papers had opened a new and fertile domain for the application of quantum concepts - the explanation of atomic structure and atomic spectra. In addition Bohr's work and its generalizations by Arnold Sommerfeld and others constituted a fresh approach to the foundations of the quantum theory of matter. Einstein's new work showed the influence of these ideas. He had found still another derivation of Planck's black-body radiation law, an 'astonishingly simple and general' one which, he thought, might properly be called 'the derivation' [Einstein in a letter to Besso 11 August 1916] of this important law" (DSB). "In November 1916 Einstein wrote to Besso: 'A splendid light has dawned on me about the absorption and emission of radiation.' He had obtained a deep insight into the meaning of his heuristic principle, and this led him to a new derivation of Planck's radiation law. His reasoning is contained in three papers, two of which appeared in 1916 the third one early in 1917" (Pais, "Subtle is the Lord " The Science and the Life of Albert Einstein P. 405). Einstein and Besso met as students at the Federal Polytechnic Institute in Zurich and worked later at the patent office in Berne. They collaborated on the Einstein-Besso Manuscript of calculations of the precession of the perihelion of mercury, and remained lifelong correspondents. BRL 81; Weil 85.