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complementarity principle
(Encyclopedia)complementarity principle, physical principle enunciated by Niels Bohr in 1928 stating that certain physical concepts are complementary. If two concepts are complementary, an experiment that clearly i...Ehrenfest, Paul
(Encyclopedia)Ehrenfest, Paul poul āˈrənfĕst [key], 1880–1933, Austrian physicist. In 1904, Ehrenfest received his doctorate in theoretical physics in Vienna and married the Russian mathematician Tatyana Alex...Brahe, Tycho
(Encyclopedia)Brahe, Tycho tīˈkō brä [key], 1546–1601, Danish astronomer. The most prominent astronomer of the late 16th cent., he paved the way for future discoveries by improving instruments and by his prec...Landau, Lev Davidovich
(Encyclopedia)Landau, Lev Davidovich lyĕf dəvēˈdəvĭch ləndouˈ [key], 1908–68, Soviet physicist, b. Baku, Azerbaijan. A child prodigy in mathematics, he entered Baku Univ. at 14; at 21 he received a doctor...Sommerfeld, Arnold Johannes Wilhelm
(Encyclopedia)Sommerfeld, Arnold Johannes Wilhelm ärˈnōlt yōhänˈəs vĭlˈhĕlm zômˈərfĕlt [key], 1868–1951, German physicist and teacher. He received a Ph.D. at Königsburg Univ. in 1891 and was a prof...Steno, Nicolaus
(Encyclopedia)Steno, Nicolaus nēls stānˈsən [key], 1638–86, Danish anatomist, geologist, and Roman Catholic prelate. He lived principally in Copenhagen, Paris, and Florence. He investigated the heart, brain, ...front
(Encyclopedia)CE5 Fronts: A. Advance of a cold front B. Advance of a warm front front, in meteorology, zone of transition between adjacent air masses. If a cold air mass is advancing to replace a warmer one, th...correspondence principle
(Encyclopedia)correspondence principle, physical principle, enunciated by Niels Bohr in 1923, according to which the predictions of the quantum theory must correspond to the predictions of the classical theories of...Köhler, Georges Jean Franz
(Encyclopedia)Köhler, Georges Jean Franz kōˈlər, Ger. köˈlər [key], 1946–95, German immunologist, Ph.D. Univ. of Freiburg, 1974. He worked (1974–76) with César Milstein at the Laboratory of Molecular Bi...Holberg, Ludvig, Baron
(Encyclopedia)Holberg, Ludvig, Baron lo͞oᵺˈvē bärōnˈ hōlˈbĕr [key], 1684–1754, Danish dramatist, essayist, poet, and historian, apostle of the Enlightenment in Scandinavia. Born in Norway, he studied t...Browse by Subject
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