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Prof. J. C. Bose. On the Continuity of
[Apr. 18,
effects described below may be obtained by much feebler light, such as that given by a paraffin lamp or a candle. The strong similarity to
Fig. 9.—Electromotive variation in AgBr cell due to the action of light. Ordinate represents E.M. variation, and abscissa the time. Thick lines represent the effect of light and dotted lines the recovery. (a) and (b) represent the effect of flashes of light of 2 seconds duration. The distance of source of light in (a) = 12 inches; in (b) = 6 inches. (c) and (d) represent the effect of continuous light (duration 30″), distance of source of light in (c) = 18 inches, in (d) = 9 inches.
the curve for single flashes of electric radiation (see fig. 4) will at once be noticed. The recovery curve is also convex to the abscissa. The time allowed for recovery was not sufficient to bring the substance
