LUMINESCENCE

Luminescence

Luminescence is emission of light by a substance not resulting from heat; it is thus a form of cold body radiation. It can be caused by chemical reactions, electrical energy, subatomic motions, or stress on a crystal. This distinguishes luminescence from incandescence, which is light emitted by a substance as a result of heating. Historically, radioactivity was thought of as a form of "radio-luminescence", although it is today considered to be separate since it involves more than electromagnetic radiation. The term 'luminescence' was introduced in 1888 by Eilhard Wiedemann.

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luminescence

Noun

  1. Any emission of light that cannot be attributed merely to the temperature of the emitting body.


The above text is a snippet from Wiktionary: luminescence
and as such is available under the Creative Commons Attribution/Share-Alike License.

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