Luminescence
Encyclopedia : L : LU : LUM : Luminescence
Luminescence is light not generated by high temperatures alone.
It is different from incandescence, in that it usually occurs at low temperatures. Examples include fluorescence, bioluminescence and phosphorescence.
Luminescence can be caused by chemical or biochemical changes, electrical energy, subatomic motions, reactions in crystals, or stimulation of an atomic system.
The process of coating dials, hands, scales and signs on, particularly, aviation and navigational instruments and markings with luminescent materials is known as luminising.
The following kinds of luminescence are known to exist:
- Chemoluminescence (including Bioluminescence)
- Crystalloluminescence
- Electroluminescence
- *Cathodoluminescence
- Photoluminescence
- *Phosphorescence
- *Fluorescence
- Radioluminescence
- Sonoluminescence
- Thermoluminescence
- Triboluminescence
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