Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 264
ve would be a circle.But he found a marked divergence.He proceeded to compare the two curvesby drawing a circle circumscribing hisnumeratrix. The major axis of thelatter became a diameter of the circle.The differences represented an apparentdeficiency of reflecting power, to which hespecifically… … Fig. 16.—Bouguers curve with osculating circle. in which the largest possible circle thatosculates at the pole has been inscribed.The observed difference is an excessand is due to specular reflexion. Usefulas polar curves are in many cases,they are in general not so convenientfor comparison of…
Lighting
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