CHAPTER 25 THE MEASUREMENT OF TRANSMISSION, ABSORPTION, EMISSION, AND REFLECTION James M. Palmer Optical Sciences Center Uniy ersity of Arizona Tucson , Arizona 25.1 GLOSSARY A area a absorption bb blackbody c 2 second radiation constant E irradiance f bidirectional scattering distribution function i internal L radiance P electrical power R reflectance factor r reflection T temperature t transmission a absorptance a 9 absorption coef ficient » emittance (emissivity) θ , f angles r reflectance s Stefan Boltzmann constant τ transmittance F power (flux) Ω projected solid angle 25.1
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