re·flec·tance (r -fl k t ns)n. The ratio of the total amount of radiation, as of light, reflected by a surface to the total amount of radiation incident on the surface. |
reflectance [rɪˈflɛktəns], reflection factor
n
(Mathematics & Measurements / Units) 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. Symbol ρ Compare transmittance, absorptance
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| Noun | 1. | reflectance - the fraction of radiant energy that is reflected from a surface coefficient - a constant number that serves as a measure of some property or characteristic |
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