Fluorescence
/fləˈresns/noun
The emission of light by a material that has absorbed light or other electromagnetic radiation.
The ruby has a deep red fluorescence under ultraviolet light.
Often appears as...
- ultraviolet fluorescence
- fluorescence microscopy
Usage tips
Technical
Definition 1 of 2
Pro Tip 1/3Scientific Term
Used mainly in scientific contexts, like chemistry and physics, to describe a physical phenomenon.
Scientists use fluorescence to track changes in cells.
Pro Tip 2/3Not Always Visible
Fluorescence isn't always visible to the naked eye; sometimes, special equipment is needed.
They detected the fluorescence with a special camera.
Pro Tip 3/3Light Absorption
Focus on the process: Materials absorb light then emit it, which is the essence of fluorescence.
Some minerals show fluorescence after absorbing sunlight.
Compare with
bioluminescencebrillianceemissionglowincandescenceirradiatephosphorescenceradiance
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