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Identify the radioactive green light that glows in the dark.

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Phosphorescence is the kind of luminescence that uses phosphors to make something glow in the dark. Some examples of this type of luminescence include items like a computer screen and white LED lights.
User JustBoo
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Discovered by Marie Curie in the late 1800's, radium was used by the US Radium Corporation in the early 1900's to produce luminous paint by mixing it with zinc sulfide. The resultant mixture gave off a faint green glow, and was used to paint everything from watch faces to gun sights.

Phosphorescence is the kind of luminescence that uses phosphors to make something glow in the dark.

User Dozie
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