phosphor

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phosphor

a substance, such as the coating on a cathode-ray tube, capable of emitting light when irradiated with particles or electromagnetic radiation

Phosphor

The internal coating of fluorescent bulbs, which glows when bombarded with electromagnetic radiation.

phosphor

[′fäs·fər]
(physics)

phosphor

A substance capable of luminescence, such as a fluorescent powder which absorbs ultraviolet power and reemits it as visible light; used to coat the inside of various electric-discharge lamps.

phosphor

A rare earth material used to coat the inside face of a CRT and plasma TV screen. When struck by an electron beam, the phosphor emits a visible light for a few milliseconds. In color displays, red, green and blue phosphor dots are grouped as a cluster. See CRT, plasma display, screen burn and phosphorene.