Cool
light emitted by sources as a result of the movement of electrons from more energetic states to less energetic states.
There are many types of luminescence. Chemiluminescence
is produced by certain chemical reactions.
Electroluminescence is produced by
electric discharges, which may appear when silk or fur is stroked or when
adhesive surfaces are separated. Triboluminescence
is produced by rubbing or crushing crystals.
A
phenomena of light emission by a chemical composition which is film-forming
and which absorbs light, releasing it when extraneous light sources have been
removed; a "glow-in-the-dark" capability.
