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- Dictionaryphosphorescence/ˌfɒsfəˈrɛsns/
noun
- 1. light emitted by a substance without combustion or perceptible heat: "the stones overhead gleamed with phosphorescence"
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noun
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Process in which energy absorbed by a substance is released relatively slowly in the form of light
Phosphorescence is a type of photoluminescence related to fluorescence. When exposed to light (radiation) of a shorter wavelength, a phosphorescent substance will glow, absorbing the light and reemitting it at a longer wavelength. Unlike fluorescence, a phosphorescent material does not immediately reemit the radiation it absorbs. Instead, a phosphorescent material absorbs some of the radiation ene... Wikipedia