Why doesn't my skin glow in the dark when I shine light

>>9086968
The de-excitation time is really short for skin.
Some other substances like phosphorus decay more slowly, emitting light in darkness.

>>9086968
i dont know about regular glowing, but fluorescence uses pretty high energy photons

File: molecule_excite.gif (158KB, 280x280px) Image search: [Google]

158KB, 280x280px

>>9086968
It does glow, just not at visible wavelengths. The decay via energy transfer you're referring to is just heat transfer, and most heat from your body is carried off through convection with the air. Also, compared to the heat produced from your cells metabolizing ATP, the energy coming from a lamp would be negligible. You'd sooner glow from your own body's waste heat than you would from coming into contact with light.

You people are strange. You shine a light on your skin and you don't see anything? Are you all blind?

What if I'm black?

>>9088710
then you get black body radiation