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Stokes, Sir George Gabriel
(Encyclopedia)Stokes, Sir George Gabriel, 1819–1903, British mathematician and physicist, b. Ireland, studied at Cambridge. From 1849 he was a professor of mathematics at Cambridge; he served as secretary (1854...fluorescence
(Encyclopedia)fluorescence flo͝orĕsˈəns [key], luminescence in which light of a visible color is emitted from a substance under stimulation or excitation by light or other forms of electromagnetic radiation or ...zinc oxide
(Encyclopedia)zinc oxide, chemical compound, ZnO, that is nearly insoluble in water but soluble in acids or alkalies. It occurs as white hexagonal crystals or a white powder commonly known as zinc white. Zinc white...ether, in physics and astronomy
(Encyclopedia)ether or aether, in physics and astronomy, a hypothetical medium for transmitting light and heat (radiation), filling all unoccupied space; it is also called luminiferous ether. In Newtonian physics a...light-emitting diode
(Encyclopedia)light-emitting diode: see diode.electric-light bug
(Encyclopedia)electric-light bug: see water bug. ...luminism
(Encyclopedia)luminism lo͞oˈmĭnĭzˌəm [key], American art movement of the 19th cent. Luminism was an outgrowth of the Hudson River school. In its concern for capturing the effects of light and atmosphere it is...Tucker, Abraham
(Encyclopedia)Tucker, Abraham, 1705–74, English philosopher, b. London. He studied law at Merton College, Oxford, and later devoted himself to independent study. He advanced the ethical view that each man seeks h...Suffolk sheep
(Encyclopedia)Suffolk sheep, relatively large breed, developed in England, well-known for its high quality meat. Considered to be a recent introduction to the United States, the breed has many desirable qualities a...combustion
(Encyclopedia)combustion, rapid chemical reaction of two or more substances with a characteristic liberation of heat and light; it is commonly called burning. The burning of a fuel (e.g., wood, coal, oil, or natura...Browse by Subject
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