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Bragg, Sir William Lawrence

(Encyclopedia) Bragg, Sir William Lawrence, 1890–1971, English physicist, b. Adelaide, Australia, educated in Australia and at Trinity College, Cambridge; son of W. H. Bragg. He was professor of…

Hodgkin, Dorothy Mary Crowfoot

(Encyclopedia) Hodgkin, Dorothy Mary Crowfoot, 1910–94, English chemist and X-ray crystallographer, b. Egypt. She received the 1964 Nobel Prize in chemistry for determining the structure of…

reflection

(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…

Bragg, Sir William Henry

(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…

Nicol prism

(Encyclopedia) Nicol prismNicol prismnĭkˈəl [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…

December 2008 Current Events

Here are the key news events of the month organized into three categories: World News, U.S. News, and Business, Society, and Science News. World | Nation | Business/…

Orbiting Solar Observatory

(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…

DK Science: Space Observatories

ELECTROMAGNETIC WAVESCOMPTON GAMMA RAY OBSERVATORYCHANDRA X-RAY OBSERVATORYSOHO’S SUNWATCHSPITZER OBSERVATORYHUBBLE SPACE TELESCOPEFIND OUT MOREHigh above the Earth’s atmosphere, space…

Eames, Charles

(Encyclopedia) Eames, CharlesEames, Charlesāmz [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…

skiagraph

(Encyclopedia) skiagraph: see X ray.