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Phosphorescence facts for kids

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Phosphorescent, europium-doped strontium silicate-aluminate oxide powder under visible light, long-wave UV light, and in total darkness

Phosphorescence is a process in which energy absorbed by a substance is released relatively slowly in the form of light. This is in some cases the mechanism used for "glow-in-the-dark" materials which are "charged" by exposure to light. Unlike the relatively swift reactions in a common fluorescent tube, phosphorescent materials used for these materials absorb the energy and "store" it for a longer time as the processes required to re-emit the light occur less often.

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Phosphorescence Facts for Kids. Kiddle Encyclopedia.