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Luminescence is a spontaneous emission of radiation from an electronically or vibrationally excited species not in thermal equilibrium with its environment This type of energy transfer is observed with inorganic as well as organic substances. Luminescence, emission of light by certain materials when they are relatively cool

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It is in contrast to light emitted from incandescent bodies, such as burning wood or coal, molten iron, and wire heated by an electric current. The luminescence photons emitted by one kind of excited atom, molecule, or phosphor can excite another to emit its specific luminescence Luminescence is an interdisciplinary journal for research on fundamental & applied aspects of all forms of luminescence, covering optics, photonics & electromagnetics.

Luminescence is light emission that does not result from heat, unlike incandescence

It occurs when electrons absorb energy and release it as light while returning to a lower energy state. That's an example of what we call photoluminescence But you can make things give off light by exciting their atoms with many other kinds of energy You give the atoms one kind of energy (light, heat, sound, or whatever) and they give the same energy back to you as light.

How to use luminescence in a sentence. Luminescence is the phenomenon of emission of light from materials owing to the transitions of electrons from the excited energy state (higher energy) to the ground state (lower energy) after excitation by an external source of energy. The ocean often emits a visible glow, or luminescence, which extends for miles at night They toil over the perfect shade of pigment, the architectural details of an elaborate building, the luminescence of a wine glass.

Luminescence is the emission of light by a substance as a result of a chemical reaction (chemiluminescence) or an enzymatic reaction (bioluminescence).