Columbia Encyclopedia

Search results

500 results found

spectrophotometer

(Encyclopedia)spectrophotometer, instrument for measuring and comparing the intensities of common spectral lines in the spectra of two different sources of light. See photometry; spectroscope; spectrum. ...

stereopticon

(Encyclopedia)stereopticon stĕrēŏpˈtĭkən [key], optical projection instrument making multiple use of the magic lantern. The magic lantern uses lenses to throw on a screen a magnified image from a transparent ...

Borger

(Encyclopedia)Borger bôrˈgər [key], city (2020 pop. 12,551), Hutchinson co., extreme N Tex., in the Panh...

Brentwood, towns, United States

(Encyclopedia)Brentwood. 1 Uninc. town (2020 pop. 63,399), Suffolk co., SE N.Y., on central Long Island, in the town of Islip. It is mainly residential, with ...

Brevard

(Encyclopedia)Brevard brəvärdˈ [key], town (2020 pop. 8,004), seat of Transylvania co., SW N.C., near Fr...

West New York

(Encyclopedia)West New York, town (1990 pop. 38,125), Hudson co., NE N.J., atop the Palisades across the Hudson River from New York City; settled 1790, inc. 1898. It is a residential town with some light industry, ...

Zhuzhou

(Encyclopedia)Zhuzhou or Chuchow both: jo͞oˈjōˈ [key], town (1994 est. pop. 476,800), E central Hunan prov., China, on the Xiang River. It is a railroad center for lines running north-south and east-west and a ...

Land, Edwin Herbert

(Encyclopedia)Land, Edwin Herbert, 1909–91, American inventor and photographic pioneer. While at Harvard, Land became interested in the properties and manipulation of polarized light. He left Harvard and, in 1932...

Lorentz, Hendrik Antoon

(Encyclopedia)Lorentz, Hendrik Antoon hĕnˈdrək änˈtōn lōˈrĕnts [key], 1853–1928, Dutch physicist, a pioneer in formulating the relations between electricity, magnetism, and light. He was one of the first...

Porter, George, Baron Porter of Luddenham

(Encyclopedia)Porter, George, Baron Porter of Luddenham, 1920–2002, British chemist, b. Stainforth, England, grad. Leeds Univ., Ph.D. Cambridge, 1949. After serving as a radar officer during World War II, he did ...