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reflectance

   Also found in: Dictionary/thesaurus, Acronyms, Encyclopedia, Wikipedia 0.01 sec.
reflectance 
A measure of reflection equal to the ratio of reflected luminous flux Ε′ to the incident luminous flux Ε, i.e. ρ = Ε′/Ε. Syn. reflection factor. See Fresnel's formula.


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However, the new patented mirror system has very high reflectance in the UV and near-visible wavelength ranges, while attenuating reflectance in the longer wavelength-visible and IR portions of the solar spectrum.
It uses a patented mirror system that has a very high reflectance in the UV and near-visible wavelength ranges, while attenuating reflectance in the longer wavelength visible and IR portions of the solar spectrum.
Keyes then developed a chart that expressed measured shading coefficient (SC), defined as the ratio of solar gain through a window to the solar gain through a standard layer of clear glass as a function of yarn reflectance and weave openness when a drapery was combined with both regular plate and heat-absorbing glass.
 
 
 
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