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quantum efficiency

noun
1.
(physics) the number of electrons released by a photocell per photon of incident radiation of a given energy
2.
(chem) the number of chemical species that undergo reaction per photon of absorbed radiation of a given energy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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