Fluorescence
Translation- Fluorescence
- Fluorescence Flu`o*res"cence, n. [From {Fluor}.] (Chemistry,
Optics)
A luminescence emitted by certain substances due to the
absorption of radiation at one wavelength, and the almost
instantaneous re-emission of radiation at another, usually
longer wavelength. The re-radiation stops almost as soon as
the incident radiation is halted, thus distinguishing this
phenomenon from {phosphorescence}, in which re-radiation of
light may continue for some time after the incident radiation
is halted.
Note: The color of the radiated light typically differs from the apparent color 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, by first absorbing the light to achieve an excited state, and then radiating light to resume the ground energy level. The light emitted by fluorescent substances is in general of longer wavelength than the incident light. The radiation can also be induced by ionizing radiation which is not electromagnetic, such as alpha or beta rays, and cathode rays. This property is possessed by fluorspar, uranium glass, sulphide of calcium, and many other substances. It finds use in analytical instruments to detect or measure radiation, and in some commercial applications. [1913 Webster +PJC]
The Collaborative International Dictionary of English. 2000.
Look at other dictionaries:
fluorescence — noun свечение, флуоресценция … Англо-русский словарь Мюллера
fluorescence — 1> флюоресценция, свечение … Новый большой англо-русский словарь
Fluorescence — Fluorescent minerals emit visible light when exposed to ultraviolet light Fluorescence is the emission of light by a substance that has absorbed light or other electromagnetic radiation of a different wavelength.[1] It is a form of luminescence.… … Wikipedia
Fluorescence — La fluorescence est une émission lumineuse provoquée par l excitation d une molécule (généralement par absorption d un photon) immédiatement suivie d une émission spontanée. Ce processus est différent de la phosphorescence. La fluorescence peut… … Wikipédia en Français
fluorescence — /floo res euhns, flaw , floh /, n. Physics, Chem. 1. the emission of radiation, esp. of visible light, by a substance during exposure to external radiation, as light or x rays. Cf. phosphorescence (def. 1). 2. the property possessed by a… … Universalium
fluorescence — флуоресценция dual color fluorescence двухцветовая [бихромофорная] флуоресценция integrated fluorescence of untreated cells неспецифическая [фоновая] флуоресценция интактных клеток (при разделении клеток на клеточном сортере) relative integrated… … Англо-русский словарь по иммунологии
fluorescence — fluəˈresns сущ. свечение, флуоресценция Syn : luminescence флюоресценция, свечение fluorescence свечение, флуоресценция … Большой англо-русский и русско-английский словарь
fluorescence — f физ. флуоресценция, свечение lampe [tube] à fluorescence лампа дневного света … Большой французско-русский и русско-французский словарь
fluorescence — флуоресценция superradiant fluorescence … Англо-русский словарь технических терминов
fluorescence — 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 10 8 seconds :… … Dictionary of molecular biology
