Other Free Encyclopedias » 21st Century Webster's Family Encyclopedia » 21st Century Webster's Family Encyclopedia - Anderson, Elizabeth Garrett to Arctic tern

Arc light


Arc light, device in which electrical current flowing between poles or electrodes produces the electric arc, yielding an intensely bright light. Arc lights are used in searchlights and movie projectors. The mercury arc is the basis for modern fluorescent lamps.

See also: Electric light.

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