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Clarke, Arthur C.
(Encyclopedia)Clarke, Arthur C. (Sir Arthur Charles Clarke), 1917–2008, British science fiction writer. During World War II he served as a radar instructor and aviator in the Royal Air Force. After the war he obt...Washington, Denzel
(Encyclopedia) Washington, Denzel (Denzel Hayes Washington Jr.), 1954- , African-American actor, b. Mount Vernon, N.Y., Fordham Univ. (B.A., 1977). Washington’s fa...cam, mechanical device
(Encyclopedia)cam, mechanical device for converting a rotating motion into a reciprocating, or back-and-forth, motion, or for changing a simple motion into a complex one. A simple form of cam is a circular disk set...Stieglitz, Alfred
(Encyclopedia)Stieglitz, Alfred stēgˈlĭts [key], 1864–1946, American photographer, editor, and art exhibitor, b. Hoboken, N.J. The first art photographer in the United States, Stieglitz more than any other Ame...vortex
(Encyclopedia)vortex vôrˈtĕks [key], mass of fluid in whirling or rotary motion. To simplify the analysis, vortex motion usually describes motions in a frictionless fluid. In such cases the absence of friction w...Newton's laws of motion
(Encyclopedia)Newton's laws of motion: see motion. ...Riboud, Marc
(Encyclopedia)Riboud, Marc, 1923–2016, French photojournalist. After fighting in the resistance during World War II, he studied engineering. In 1952 he moved to Paris, where he met Henri Cartier-Bresson, who beca...Eastman, George
(Encyclopedia)Eastman, George, 1854–1932, American inventor, industrialist, and philanthropist, b. Waterville, N.Y. By mass production of his photographic inventions, Eastman enormously stimulated the development...Brownian movement
(Encyclopedia)Brownian movement or motion, zigzag, irregular motion exhibited by minute particles of matter when suspended in a fluid. The effect has been observed in all types of colloidal suspensions (see colloid...holography
(Encyclopedia)holography hŏlŏgˈrəfē, hō– [key], method of reproducing a three-dimensional image of an object by means of light wave patterns recorded on a photographic plate or film. Holography is sometimes...Browse by Subject
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