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Zeeman effect

(Encyclopedia)Zeeman effect, splitting of a single spectral line (see spectrum) into a group of closely spaced lines when the substance producing the single line is subjected to a uniform magnetic field. The effect...

Veblen, Thorstein

(Encyclopedia)Veblen, Thorstein thôrˈstīn vĕbˈlən [key], 1857–1929, American economist and social critic, b. Cato Township, Wis. Of Norwegian parentage, he spent his first 17 years in Norwegian-American far...

Thomson, Sir Joseph John

(Encyclopedia)Thomson, Sir Joseph John, 1856–1940, English physicist. From 1884 to 1919 he was Cavendish professor of experimental physics at Cambridge. J. J. Thomson was one of the founders of modern physics. Wi...

motion

(Encyclopedia)motion, the change of position of one body with respect to another. The rate of change is the speed of the body. If the direction of motion is also given, then the velocity of the body is determined; ...

Cooley, Charles Horton

(Encyclopedia)Cooley, Charles Horton, 1864–1929, American sociologist, b. Ann Arbor, Mich., grad. Univ. of Michigan (B.A., 1887; Ph.D., 1894); son of Thomas M. Cooley. He taught in the sociology department at the...

Eysenck, Hans Jurgen

(Encyclopedia)Eysenck, Hans Jurgen häns yo͝orˈgən īˈsĕngk [key], 1916–97, British psychologist. Best known for his theory of human personality, Eysenck suggested that personality is biologically determined...

Fellenberg, Philipp Emanuel von

(Encyclopedia)Fellenberg, Philipp Emanuel von fēˈlĭp āmäˈno͞oĕl fən fĕlˈənbĕrkh [key], 1771–1844, Swiss educator and agriculturist. He purchased (1799) an estate, Hofwyl (near Bern), where he put int...

Frankel, Charles

(Encyclopedia)Frankel, Charles, 1917–79, American philosopher, b. New York City, grad. Columbia 1937, Ph.D., 1946. A teacher at Columbia since 1939, he became Old Dominion professor of philosophy and public affai...

Goddard, Robert Hutchings

(Encyclopedia)Goddard, Robert Hutchings, 1882–1945, American physicist and rocket expert, b. Worcester, Mass., grad. Worcester Polytechnic Institute (B.S., 1908), Ph.D. Clark Univ., 1911. From 1914 he was associa...

Giannotti, Donato

(Encyclopedia)Giannotti, Donato dōnäˈtō jän-nôtˈtē [key], 1492–1573, Italian political theorist, b. Florence. He studied at Pisa and in 1527 became secretary of the supreme council of the Florentine repub...