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View synonyms for fluorescence
fluorescence
[ floo-res-uhns, flaw-, floh- ]
noun
, Physics, Chemistry.
- the emission of radiation, especially of visible light, by a substance during exposure to external radiation, as light or x-rays. Compare phosphorescence ( def 1 ).
- the property possessed by a substance capable of such emission.
- the radiation so produced.
fluorescence
/ ˌflʊəˈrɛsəns /
noun
- physics
- 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
- such an emission of photons that ceases as soon as the bombarding radiation is discontinued
- such an emission of photons for which the average lifetime of the excited atoms and molecules is less than about 10 –8seconds
- the radiation emitted as a result of fluorescence Compare phosphorescence
fluorescence
- The emission of light from an object as a result of bombardment by other kinds of electromagnetic radiation , such as x-rays or ultraviolet rays. Fluorescent materials may appear one color when bathed in visible light and another color when exposed to other kinds of electromagnetic radiation.
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Notes
“Black light” depends on fluorescence for its effects.
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Other Words From
- nonfluo·rescence noun
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Word History and Origins
Origin of fluorescence1
1852; fluor(spar) + -escence, on the model of opalescence ( def ), in reference to the mineral's newly discovered property
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Word History and Origins
Origin of fluorescence1
C19: fluor + -escence (as in opalescence )
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Example Sentences
This solution will show a characteristic blue fluorescence when quinin is present.
From Project Gutenberg
In other words, Grew seems to have observed the characteristic fluorescence of chlorophyll.
From Project Gutenberg
Anthracene is a white crystalline hydrocarbon, having a bluish fluorescence, melting at 213° C. and boiling above 360° C.
From Project Gutenberg
My Platinochloride develops octohedron crystals,—with a fine blue fluorescence.
From Project Gutenberg
Mineral oils have a characteristic bloom, showing a greenish fluorescence when examined by transmitted light.
From Project Gutenberg
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