fluorescence
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Related to fluorescence: fluorescence microscopy, phosphorescence, Fluorescence quenching, Fluorescence spectroscopy
fluo·res·cence
(flo͝o-rĕs′əns, flô-, flō-)n.
1. The emission of electromagnetic radiation, especially of visible light, stimulated in a substance by the absorption of incident radiation and persisting only as long as the stimulating radiation is continued.
2. The property of emitting such radiation.
3. The radiation so emitted.
[fluor(spar) + -escence.]
fluorescence
(ˌflʊəˈrɛsəns)n
1. (General Physics) physics
a. the emission of light or other radiation from atoms or molecules that are bombarded by particles, such as electrons, or by radiation from a separate source. The bombarding radiation produces excited atoms, molecules, or ions and these emit photons as they fall back to the ground state
b. such an emission of photons that ceases as soon as the bombarding radiation is discontinued
c. such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10–8 seconds
2. (General Physics) the radiation emitted as a result of fluorescence. Compare phosphorescence
[C19: fluor + -escence (as in opalescence)]
fluo•res•cence
(flʊˈrɛs əns, flɔ-, floʊ-)n.
1. the emission of radiation, esp. of visible light, by a substance during exposure to external radiation.
2. the property possessed by such a substance.
3. the radiation so produced.
fluo·res·cence
(flo͝o-rĕs′əns)1. The giving off of light by a substance when it is exposed to electromagnetic radiation, such as visible light or x-rays. Light is emitted only as long as the electromagnetic radiation continues to bombard the substance. Compare phosphorescence.
2. The light produced in this way.
Did You Know? Have you ever stood in a room illuminated by a "black light" and wondered why your white T-shirt, your shoelaces, and your teeth appear to glow? These objects appear so bright under ultraviolet light because they contain fluorescent materials that absorb the black light's ultraviolet rays (which are not visible to the human eye) and re-emit some of their energy as visible light. Therefore, these objects give off more visible light than is being shone on them, seemingly making something out of nothing. Many fabric whiteners leave fluorescent pigments behind in treated clothes; the clothes then look very bright because they absorb ultraviolet light from the environment and emit some of the absorbed energy as visible light.
fluorescence
The emission of light from an object which has been irradiated by light or other radiations. Energy is absorbed by the object and then re-radiated at a longer wavelength than the incident light.
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| Noun | 1. | fluorescence - light emitted during absorption of radiation of some other (invisible) wavelength autofluorescence - self-induced fluorescence light, visible light, visible radiation - (physics) electromagnetic radiation that can produce a visual sensation; "the light was filtered through a soft glass window" phosphorescence - a fluorescence that persists after the bombarding radiation has ceased |
Translations
إسْتِشْعاع، فَلْوَرَه
fluorescence
fluorescens
fluoreszkálás
flúrljóm
fluorescencia
florışıma
fluorescence
n → Fluoreszenz f
fluorescent
(fluəˈresnt) adjective giving off a certain kind of light. fluorescent light; fluorescent paint.
fluoˈrescence nounfluor·es·cence
n. fluorescencia, propiedad de emisión de luminosidad de ciertas sustancias cuando son expuestas a cierto tipo de radiación, tal como los rayos-x.