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A physical phenomenon whereby an atom of a material absorbs a photon of light an immediately emits a photon of longer wavelength. If there is a significant delay the phenomenon is called phosphorescence rather than fluorescence. It is interesting that "phosphors" used in lamps exhibit "fluorescence," not "phosphorescence." (See PHOSPHOR)

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行业/领域：灯具照明
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Company: GE
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Dragan Zivanovic

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行业/领域：医学类别肠胃病学

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A disease that occurs when the body absorbs too much iron or receives many blood transfusions. The body stores the excess iron in the liver, pancreas, ...