Problem: The glow emitted by a substance exposed to external radiation is called A. bioluminescence. B. luminescence. C. phosphorescence. D. fluorescence. 

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Bioluminescence is the emission of light by a living organism.

A fluorescent material emits light after absorbing electromagnetic radiation. The process is called fluorescence.

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Problem Details

The glow emitted by a substance exposed to external radiation is called 

A. bioluminescence. 

B. luminescence. 

C. phosphorescence. 

D. fluorescence.