light emitting diode (LED)

Definition

Electronic device that emits light when electric current flows through it. Older LEDs were made from semiconductor material such as gallium arsenide and produced only a few colors (mainly red or green). Newer LEDs are made from synthetic materials such as p-phenylenevinyl and can produce light of any color. LED-based lighting bulbs that consume little current and last for decades are under development.


light emitting diode (LED) is...

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