Any emission of light not ascribable directly to incandescence, and therefore occurring at low temperatures, as in phosphorescence and fluorescence or other luminous radiation resulting from vital processes, chemical action, friction, solution, or the influence of light or of ultraviolet or cathode rays, etc.
The faculty or power of producing light by biological processes, as in the firefly and glowworm. Also called bioluminescence.
The light produced by biological or biochemical processes. Also called bioluminescence.
emission of light from a substance unaccompanied by heat
The quality of giving off light by the absorption of radiant energy. Used to describe any cold light.
The quality of given off light by the absorbtion of radiant energy. Used to describe any cold light. See also fluorescent.
General term describing the capability of a mineral with a habit of giving off light when put under certain conditions. Three examples of luminescence are fluorescence, triboluminescence, and thermoluminescence.
emission of light from a body when its atoms are excited by means other than raising its temperature. Short-lived luminescence is called fluorescence.
light not due to incandescence; occurs at low temperatures
light from nonthermal sources
Emission of visible light when an electron returns to the ground state from an excited state.
Process in which absorbed light rays are reemitted at longer wave lengths.
The emission of visible light as a result of electron decay from an excited state.
Any emission of light at temperatures below that required for incandescence.
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. Macromolecule A very large molecule composed of hundreds or thousands of atoms.
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. http://www.sgia.org/glossary/Ll.cfm
Emission of light by chemical or electrical means.
The property of glowing in the dark after exposure to visible or ultraviolet light. Luminous paints are of two varieties, depending upon the ingredients used: 1.) Fluorescent paints glow only as long as exposed to the activating rays. 2.) Phosphorescent paints continue to glow for hours after exposure to light.
The emission and detection of light produced by chemical reactions or bioluminescence due directly to the enzyme light production. These enzymes can be used as labels to trace a molecule of interest. It does not require laser excitation like fluorescence since it is a result of a chemical reaction. The use of white plates enhances the recovery of photons.
the light given off by fluorescent brighteners and phosphorescent tagging in paper and ink when activated by ultraviolet light.
nbspRefers to the emission of light in the visible and adjacent invisible (UV and IR) regions of the spectrum. Such light may be emitted by gases, liquids or solids when energised.
Luminescence is light not generated by high temperatures alone. It is different from incandescence, in that it usually occurs at low temperatures and is thus a form of cold body radiation. It can be caused by, for example, chemical reactions, electrical energy, subatomic motions, or stress on a crystal.