Lexic.us

Definition of Fluorescence

1. Noun. Light emitted during absorption of radiation of some other (invisible) wavelength.

Definition of Fluorescence

1. n. That property which some transparent bodies have of producing at their surface, or within their substance, light different in color from the mass of the material, as when green crystals of fluor spar afford blue reflections. It is due not to the difference in the color of a distinct surface layer, but to the power which the substance has of modifying the light incident upon it. The light emitted by fluorescent substances is in general of lower refrangibility than the incident light.

2. n. A property possessed by fluor spar, uranium glass, sulphide of calcium, and many other substances, of glowing without appreciable rise of temperature when exposed to light or to ultra-violet rays, cathode rays, X rays, etc.

Definition of Fluorescence

1. Noun. (physics) The emission of light (or other electromagnetic radiation) by a material when stimulated by the absorption of radiation or of a subatomic particle ¹

2. Noun. The light so emitted ¹

¹ Source: wiktionary.com

Definition of Fluorescence

1. [n -S]

Medical Definition of Fluorescence

1. The emission of one or more photons by a molecule or atom activated by the absorption of a quantum of electro magnetic radiation. Typically the emission, that is of longer wavelength than the excitatory radiation, occurs within 10exp 8 seconds: phosphorescence is a phenomenon with a longer or much longer delay in re radiation. Note that rays, X-rays, UV, visible light and IR radiations may all stimulate fluorescence. (25 Jun 1999)

Lexicographical Neighbors of Fluorescence

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