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The Trichromatic System of Colour Measure
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absorbed absorption accuracy amount of light beam Beer's law blue-green brightness calculated cell chromaticity chart chromaticity diagram co-ordinates colorimeter colorimetry colour matching colour measurement colour mixture colour quality colour specification colour temperature cone desaturated diffusing distribution coefficients distribution curves dominant wavelength dyes energy distribution equal equal-energy field give given glass green and blue Guild illuminant illustrated in Fig incident instrument integrating sphere intensity lamp layer light flux light reflected luminosity curve magnesium oxide magnitude matt surface medium method monochromatic Munsell observer particles patterns photo-cell photo-electric photometer pigment polarising prism problems produce radiations reference stimuli reflection factor refractive index relative retina RGB system Rochon prism sample saturated scale slit spectral reflection spectral sensitivity spectrophotometer spectrum locus standard Tintometer tion transmission curve tristimulus equation unit equation visible spectrum W. D. Wright yellow