Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 260
FlG. 7.—Blondel. depolished enamelled iron. bright, the polar diagram would be asemi-circle, the equal radii representingequal brightness as seen from differentdirections, and the rectangular plottingwould give a horizontal line. … Fro. 6.—Blondel. enamelled sheet iron. Incidence = 0Fig. 8. (. Weiner, plaster of Paris. Notwithstanding his want of precision,some of his results deserve attention.Figs. 8 to 11 are polar curves showinghis results with incidence 0 deg., 30 deg.,GO deg., and 75 deg. Fig. 12 shows thesame set of…
Lighting
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