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Physics and Physiology
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absolute brightness achromatic component achromatic point adaptation afterimages appearance assumption blue brightness brilliance called central stimulus ception characteristic chro chromatic strength chromaticity diagram color perception color vision colorimetric purity colorless colors seen complementary concept consider constant curve diagram discussion dominant wavelength effect equation fact fluorence fovea frame of reference function gray grayness green heterochromatic illumination increase independent intensity involved isolated stimulus light sources lt is apparent luminance match luminous efficiency matic metameric metamers mixture monochromatic light monochromatic stimuli object colors perceived color perceptual variables photopic possible present primaries problem produce range ratio receptor reflectance relation relative luminance represent retina samples saturation scene scotopic vision sensitivity separate single spectral energy distribution spectrum locus stim stimuli seen surface surround tion unique hues unitary varying visual yellow