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Wergeland, Henrik

(Encyclopedia)Wergeland, Henrik hĕnˈrĭk vĕrˈgəlän [key], 1808–45, Norwegian writer and patriot. A champion of liberty, democracy, and international cooperation, he worked zealously for popular education an...

Wheeler, John Archibald

(Encyclopedia)Wheeler, John Archibald, 1911–2008, American physicist and educator, b. Jacksonville, Fla. Educated at Johns Hopkins (Ph.D., 1933), he joined the faculty at Princeton in 1938, and after 1976 was dir...

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...

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...

Jerne, Niels Kai

(Encyclopedia)Jerne, Niels Kai nēls kī yĕrˈnə [key], 1911–94, British-Danish immunologist, b. London. He worked at the Danish State Serum Institute (1945–55) and was chief medical officer to the World Heal...

Gade, Niels Vilhelm

(Encyclopedia)Gade, Niels Vilhelm nēls vĭlˈhĕlm gäˈᵺə [key], 1817–90, Danish composer. He studied (1843–48) in Leipzig, where he met Mendelssohn and Schumann. His eight symphonies, his chamber music, a...

Finsen, Niels Ryberg

(Encyclopedia)Finsen, Niels Ryberg nēls rüˈbĕr fĭnˈsən [key], 1860–1904, Danish physician. He established in Copenhagen an institute of light therapy and wrote several books on his work. He received the 19...

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...

Koivisto, Mauno Henrik

(Encyclopedia)Koivisto, Mauno Henrik mouˈnō hĕnˈrĭk koiˈvēstō [key], 1923–2017, Finnish politician. He was director of the Helsinki Workers' Savings Bank (1959–68) and then governor of the Bank of Finla...