phosphor(redirected from rare-earth phosphor)
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a substance, such as the coating on a cathode-ray tube, capable of emitting light when irradiated with particles or electromagnetic radiation
The internal coating of fluorescent bulbs, which glows when bombarded with electromagnetic radiation.
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.