Simon & Schuster,
Simon & Schuster, Inc. - Britannica.com britannica, reference, online, encyclopedia, encyclopaedia, store, dictionary, thesaurus Aug 12, 2021 · LED , in electronics, a semiconductor device that emits infrared or visible light when charged with an electric current. Visible LEDs are used in many electronic devices as indicator lamps, in automobiles as rear-window and brake lights, and on billboards and …
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