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Bohr, Niels Henrik David

(Encyclopedia)Bohr, Niels Henrik David bōr [key], 1885–1962, Danish physicist, one of the foremost scientists of modern physics. He studied at the Univ. of Copenhagen (Ph.D. 1911) and carried on research on the...

Bohr, Aage Niels

(Encyclopedia)Bohr, Aage Niels ägə nēls bōr [key], 1922–2009, Danish physicist, Ph.D. Univ. of Copenhagen, 1954. He worked with his father Niels Bohr (who won the Nobel Prize in Physics in 1922) in the 1940s ...

Abel, Niels Henrik

(Encyclopedia)Abel, Niels Henrik nēls hĕnˈrĭk äˈbəl [key], 1802–29, Norwegian mathematician. While a student at the Univ. of Christiania (Oslo) he did fundamental work on the integration of functional expr...

Ritz, Walter

(Encyclopedia)Ritz, Walter, 1878–1909, Swiss physicist. He taught at the universities of Zürich and Göttingen. Ritz's combination principle, confirmed by later research, stated that the frequencies of spectral ...

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...

Stensen, Niels

(Encyclopedia)Stensen, Niels: see Steno, Nicolaus. ...

Dam, Henrik

(Encyclopedia)Dam, Henrik hănˈrēk däm [key], 1895–1976, Danish biochemist. He identified vitamin K in 1934 and later investigated the role of vitamin E in nutrition. The 1943 Nobel Prize in Physiology or Medi...

Ibsen, Henrik

(Encyclopedia)Ibsen, Henrik hĕnˈrĭk ĭbˈsən [key], 1828–1906, Norwegian dramatist and poet. His early years were lonely and miserable. Distressed by the consequences of his family's financial ruin and on his...

Harpestreng, Henrik

(Encyclopedia)Harpestreng, Henrik, or Henricus Dacus, d. 1244, Danish herbalist and medical writer. He probably studied at the medical school in Salerno, and was a canon at Roskilde Cathedral, then Denmark's eccles...

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...