01 n. A luminescence emitted by certain substances due to the absorption of radiation at one wavelength, and the almost instantaneous re-emission…
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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.(Chemistry, Optics)