Light, photometry and illumination : a thoroughly rev. ed. of ''Electrical illuminating engineering'' (1912)
Barrows, William Edward, 1878-1960 · New York ; London : McGraw-Hill Book Co. · leaf 27
ing to those values given in thepreceding table. The distribution curves of reflected light from» Trans. Ilium. Eng. Soc, Vol. 5, p. 854, 1910. 12 LIGHT, PHOTOMETRY AND ILLUMINATION the different samples of glossy and semi-gloss paper show atendency toward specular reflection while the reflection… … 0= 15^ 30^ 45 Fig. 5.—Silk fibre, French gray. Apparent Candle-power.0.10 0.08 0.06 0.01 0.02 p m iy^^^ -f^n^V 60 45 0= 15 30 Fig. 6.—Varnished tile, cream. the distribution of light in a normal plane from small illuminatedsurfaces composed of some of the samples included in the table,and with the…
Light · Photometry · Electric lighting
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