Specular reflectance accessories (SRAs) enable measurements of how good a mirror is at reflecting light at a particular angle and how bad a window is about reflecting rather than passing light at a particular angle. The reflectance of a mirror often varies as a function of both the incident angle of the light beam and the wavelength of the light. Relative reflectance data in the Evolution 300 and Evolution 600 spectrophotometers can be collected using fixed angle SRAs and the VeeMAX variable angle SRA.

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