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Glow-in-the-dark workings...

Externet
in Chemistry

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Greetings.

These photoluminescence compounds absorb the energy of photons? by raising their energy level, then emit light on the energy decay.  -I think-

About intensity; the more energetic the exposure, the larger the emission return.

Color... is violet/ultraviolet the light that energizes it the most ?

Now; what about the time ?  Exposing the photoluminescent material to light, I would say becomes 'charged' at the speed of light' .  What if the exposure time is not 1 second but 1 minute ?  What changes when light is released ?  In other words, the exposure time affects the emission in intensity or duration or both ?  ...and why ? 

Is the light emitted repeatedly 'recycled' internally by the compound (as its own decaying emission is re-absorbed and re-emitted)?

 

Edited by Externet
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