Fluorescence definition

flo͝o-rĕsəns, flô-, flō-
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.
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The property of emitting such radiation.
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The radiation so emitted.
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The production of such light.
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The property of a substance, such as fluorite, of producing light while it is being acted upon by ultraviolet rays, X-rays, or other forms of radiant energy.
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Light so produced.
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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.
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The property of emitting such radiation.
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The emission of light from a material when subject to photons of another wavelength. A fluorescent object often emits visible light when it receives ultraviolet light. Fluorescence also occurs in nature; for example, fireflies and certain deep sea fish have fluorescent qualities. See fluorescent bulb.
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(physics) The emission of light (other electromagnetic radiation) by a material when stimulated by the absorption of radiation or of a subatomic particle.
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The light so emitted.
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The radiation so emitted.
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The giving off of light by a substance when it is exposed to electromagnetic radiation, such as visible light or x-rays. As long as electromagnetic radiation continues to bombard the substance, electrons in the fluorescent material become excited but return very quickly to lower energy, giving off light, always of the same frequency. Fluorescent dyes are often used in microscopic imaging, where different dyes can penetrate and illuminate different parts of the sample being examined, helping to distinguish its structures.
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The light produced in this way.
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Origin of fluorescence

  • fluor(spar) –escence

    From American Heritage Dictionary of the English Language, 5th Edition

  • Coined 1852 by physicist George Stokes from fluorspar + -escence

    From Wiktionary