Sunday, 1 July 2012

Fluorescence & Phosphorescence

Fluorescence and phosphorescence are both examples of photoluminescence. In both cases, light is absorbed and then re-emitted at a less-energetic wavelength.

Fluorescent and phosphorescent objects usually glow under exposure to ultraviolet light (though this is not a requirement).

Fluorescence involves absorbing and releasing lower energy light almost immediately, while the light release of phosphorescence is delayed, so these materials appear to glow in the dark.


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