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reflectance

[ri-flek-tuh ns] /rɪˈflɛk təns/
noun, Physics, Optics.
1.
the ratio of the intensity of reflected radiation to that of the radiation incident on a surface.
Compare albedo.
Origin
1925-1930
1925-30; reflect + -ance
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for reflectance

reflectance

/rɪˈflɛktəns/
noun
1.
a measure of the ability of a surface to reflect light or other electromagnetic radiation, equal to the ratio of the reflected flux to the incident flux ρ Compare transmittance, absorptance
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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