Columbia Encyclopedia

(Encyclopedia)  CE5 Image formation by curved mirrors and lenses reflection, return of a wave from a surface that it strikes into the medium through which it has traveled. The general principles governing the ref...

(Encyclopedia) Bragg, Sir William Henry, 1862–1942, English physicist, educated at King William's College, Isle of Man, and Trinity College, Cambridge. He served on the faculties of the Univ. of Adelaide in Austra...

(Encyclopedia) Nicol prism nĭkˈəl [key], optical device invented (1828) by William Nicol of Edinburgh. It consists essentially of a crystal of calcite, or Iceland spar, that is cut at an angle into two equal piec...

(Encyclopedia) Orbiting Solar Observatory (OSO), series of eight orbiting observatories (see observatory, orbiting) launched between 1962 and 1971 by the National Aeronautics and Space Administration (NASA) to study...

(Encyclopedia) Colby College, at Waterville, Maine; coeducational; est. 1813, opened 1818. The school, principally a liberal arts college, adopted its present name in 1899. Its library includes the papers of Edwin A...

(Encyclopedia) Abbey Theatre, Irish theatrical company devoted primarily to indigenous drama. W. B. Yeats was a leader in founding (1902) the Irish National Theatre Society with Lady Gregory, J. M. Synge, and A. E. ...

(Encyclopedia) Eames, Charles āmz [key], 1907–78, American designer, b. St. Louis, Mo. He opened his own architectural practice in 1930 and in the late 30s studied with Eliel Saarinen at the Cranbrook Academy, Bl...

(Encyclopedia) skiagraph: see X ray.

(Encyclopedia) radiography: see X ray.

(Encyclopedia) Wray, John: see Ray, John.