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Definition: The property of absorbing light of a shorter wavelength and emitting light of a longer wavelength.

For instance, a material might absorb non-visible wavelengths and emit visible light in return. Fluorescence may contribute to color metamerism between different materials.


Sometimes referred to as "Rare Earths," oxides of the following elements are added as fluorphores to give dental ceramics flourescence: cerium, europium, terbium, ytterbium.