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Einstein, Albert

(Encyclopedia)Einstein, Albert īnˈstīn [key], 1879–1955, American theoretical physicist, known for the formulation of the relativity theory, b. Ulm, Germany. He is recognized as one of the greatest physicists ...

colloid

(Encyclopedia)colloid kŏlˈoid [key] [Gr.,=gluelike], a mixture in which one substance is divided into minute particles (called colloidal particles) and dispersed throughout a second substance. The mixture is also...

photonics

(Encyclopedia)photonics, the science and technology based on and concerned with the controlled flow of photons, or light particles. It is the optical equivalent of electronics, and the two technologies coexist in s...

Bedlingtonshire

(Encyclopedia)Bedlingtonshire, town, Northumberland, NE England. A coal mining region in the 19th cent., its present economy depends upon a variety of light manufacturing. ...

Carmichael

(Encyclopedia)Carmichael, uninc. residential city (2020 pop. 64,454), Sacramento co., N central Calif., on the American River. Light manufacturing and agriculture for...

Brown, Margaret Wise

(Encyclopedia)Brown, Margaret Wise, 1910–52, American children's book author, b. Brooklyn, N.Y., B.A Hollins College, 1932. Continuing her education at the Bureau of Educational Experiments (now the Bank Street C...

palomino horse

(Encyclopedia)palomino horse, American light horse that, contrary to popular opinion, is not a breed but a color type. The palomino is a characteristic golden, creamy tan, with an almost white mane and tail. White ...

Cavan, town, Ireland

(Encyclopedia)Cavan, town, seat of Co. Cavan, N Republic of Ireland. It is a farm market with some light industry. The Roman Catholic and Anglican dioceses are in Cav...

gneiss

(Encyclopedia)gneiss nīs [key], coarse-grained, imperfectly foliated, or layered, metamorphic rock. Gneiss is characterized by alternating light and dark bands differing in mineral composition and having coarser g...

flame test

(Encyclopedia)flame test, test used in the identification of certain metals. It is based on the observation that light emitted by any element gives a unique spectrum when passed through a spectroscope. When a salt ...