Austin, Louis W. (Louis Winslow), 1867-1932, Thwing, Charles B. (Charles Burton), 1860-1946, joint author · Boston, Allyn and Bacon · leaf 117
tion. At least six settings should betaken for each of the six positions. Compute the candle-power for each position, and plot a curve showing the dis-tribution of light for the different positions of the filament. LENSES. Radius of Curvature of a Lens or Mirror. — The method of measuring the… … *p- Fig. 53. the two small gas-jets, gv ^2, which are a distance Lfrom each other. At a distance A, about 3 metres fromthe line gx #2, is placed the lens, upon the surface ofwhich is fastened a small scale, ssv upon which is read theapparent distance, Z, of the images of the two gas-jets.If a…
Physics
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