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lighting

(Encyclopedia)CE5 Incandescent lamp CE5 Basic fluorescent lamp lighting, light produced by artificial means to allow visibility in enclosures and at night. For stage lighting, see scene design and stage ligh...

stage lighting

(Encyclopedia)stage lighting and stage setting: see scene design and stage lighting. ...

scene design and stage lighting

(Encyclopedia)scene design and stage lighting, settings and illumination designed for theatrical productions. See also drama, Western; Asian drama; theater; directing; acting. Scene designers in the early 20th ce...

arc, in electricity

(Encyclopedia)arc, in electricity, highly luminous and intensely hot discharge of electricity between two electrodes. The arc was discovered early in the 19th cent. by the English scientist Sir Humphry Davy, who so...

Longhorn Cavern

(Encyclopedia)Longhorn Cavern, limestone cave, central Tex., at Burnet. On the northern edge of the Edwards Plateau, the cave (explored length c.8 mi/13 km) lies beneath a triangular ridge rising above the valley o...

Fleming, Sir John Ambrose

(Encyclopedia)Fleming, Sir John Ambrose, 1849–1945, English electrical engineer. He was a leader in the development of electric lighting, the telephone, and wireless telegraphy in England and the inventor of a th...

thyristor

(Encyclopedia)thyristor, semiconductor switch used chiefly in power-control applications. Also called a silicon-controlled rectifier (SCR; see rectifier), it is a variation of the transistor. A thyristor is capable...

lamp

(Encyclopedia)lamp, originally a vessel for holding oil or some combustible substance that could be burned through a wick for illumination; the term has been extended to other lighting devices. Stones, shells, and ...

light bulb

(Encyclopedia)light bulb: see lighting.

Rural Electrification Administration

(Encyclopedia)Rural Electrification Administration (REA), former agency of the U.S. Dept. of Agriculture charged with administering loan programs for electrification and telephone service in rural areas. The REA wa...