A phosphor is a substance that exhibits the phenomenon of luminescence; it emits light when exposed to some type of radiant energy.

What is the word phosphor means?

1 : a phosphorescent substance. 2 : a luminescent substance that emits light when excited by radiation (such as electrons) and is used especially in fluorescent lamps and cathode-ray tubes.

What is an example of phosphor?

Copper doped zinc sulfide (ZnS:Cu) is the most common phosphor used and yields blue-green light. Copper and magnesium doped zinc sulfide (ZnS:Cu,Mg) yields yellow-orange light. Tritium is also used as a source of radiation in various products utilizing tritium illumination.