Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 271
Fig. 32.—Bristol board. s = 40 deg. The differences are given in Fig. 33.With £ = 60° the increasing reflectingpower is very marked, as appears inFig. 34, which is plotted to half theradial scale of the other curves. Thedifferences from a circle of diameter 33are given in Fig. 35. Observations… … 90 75 60 *5 30 15 0 15 30 4-5 60 75 90FlG. 33.—Analysis of Fig. 32. The differences representing thespecular reflexion separated from thescattered reflexion give curves having astrong resemblance to skew probabilitycurves, but more than that cannot besaid until the work has been repeatedwith…
Lighting
Internet Archive · University of Toronto Libraries · Public Domain Mark 1.0. Free to use for anything.
