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Niebuhr, Helmut Richard

(Encyclopedia)Niebuhr, Helmut Richard, 1894–1962, American theologian, b. Wright City, Mo., grad. Elmhurst College (Ill.), 1912, and Eden Theological Seminary, 1915, M.A. Washington Univ., 1917, B.D. Yale Divinit...

Gabor, Dennis

(Encyclopedia)Gabor, Dennis, 1900–1979, Hungarian-born British physicist, Ph.D. Berlin Institute of Technology 1927. Gabor was a researcher with the Thomson-Houston Company, England, from 1934 to 1949 and a profe...

Fort Myers

(Encyclopedia)Fort Myers, city (2020 pop. 86,395), seat of Lee co., SW Fla., on the Caloosahatchee River, near the Gulf of Mexico; founded 1850, inc. 1905. It has a t...

Mantel, Dame Hilary

(Encyclopedia)Mantel, Dame Hilary, 1952–, English novelist, b. Hilary Mary Thompson. After working as a social worker, she moved to Botswana with her geologist husband and later to Jiddah, Saudi Arabia, where she...

Fox, George

(Encyclopedia)Fox, George, 1624–91, English religious leader, founder of the Society of Friends, b. Fenny Drayton in Leicestershire. As a boy he was apprenticed to a shoemaker and wool dealer. By nature serious a...

mirror

(Encyclopedia)mirror, in optics, a reflecting surface that forms an image of an object when light rays coming from that object fall upon it (see reflection). Usually mirrors are made of plate glass, one side of whi...

Wallaceburg

(Encyclopedia)Wallaceburg, town (1991 pop. 11,846), SE Ont., Canada, on the Sydenham River near Lake St. Clair. It is a port of entry with some light industry. ...

virtual telescope

(Encyclopedia)virtual telescope, a computerized interferometer (see interference) that merges the images from two or more telescopes to obtain a single, large, enhanced image. The image in each telescope is made fr...

Hertz, Heinrich Rudolf

(Encyclopedia)Hertz, Heinrich Rudolf hĕrts [key], 1857–94, German physicist. He confirmed J. C. Maxwell's electromagnetic theory and in the course of experiments (1886–89) produced and studied electromagnetic...

stroboscope

(Encyclopedia)stroboscope strŏbˈəskōp [key], optical instrument for making a moving object appear to be slowed down or stationary. This effect is created by interrupting the observer's view so that the object i...