The Luminescence reference article from the English Wikipedia on 24-Apr-2004
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Luminescence

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Luminescence, cold light, refers to emitted light from bodies at low temperatures, in comparison with temperature radiation or electromagnetic radiation for bodies at high temperature. The phenomenon occurs in materials, organism and chemical reactions with the common property that electromagnetic radiation is emitted near low temperatures.

L. is any emission of electromagnetic radiation. Historically, even radioactivity was first thought as a form of a "radioluminescence", although it is today considered as radioactivity since it involves not only electromagnetic radiation.

See also: Phosphorescence, Fluorescence (known together as photoluminescence), Thermoluminescence, Triboluminescence, Chemoluminescence, Bioluminescence, Crystalloluminescence, Electroluminescence.

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