A course of experiments in physical measurement (1897)
Whiting, Harold, d. 1895 · Boston, D.C. Heath and Co. · leaf 335
Fig. la/ The position of the prongs will seem to change as ifthe fork were executing a very slow vibration. Whenthe fork is held close behind the rim of the disc, as inFig. 137, a different effect is produced. Let us first consider the effect of a single slit mov-ing along the fork. Let 1, 2, 3, 4,… … Pig. 138. be views of the fork seen through such a slit whenoccupying the successive positions a, b, c, d, e,f, g, h,and {. These views are evidently situated along thedotted line ai. Let us now supply the intermediateviews. We shall evidently have the curve shown in irus.J THK TOOTHED WHEEL. 305…
Physics
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