Elementary treatise on physics, experimental and applied : for the use of colleges and schools (1906)
Ganot, A. (Adolphe), 1804-1887, Atkinson, Edmund, 1831-1901, Reinold, A. W. (Arnold William), 1843-1921 · New York : Wood · leaf 682
the aperture, o, for then it wouldbe masked by the screen PP. Accordingly, when an observer saw the body«, it would not be illuminated, as the light would be intercepted I>y the closed 664 On Light [650 parts of a screen MM. The body a would alternately appear and disappear ;it would disappear… … Fig. 637 for instance, that they made 150 turns in a second ; as one revolution of thescreens is effected in t^,t> of a second, there would be four appearances andfour disappearances during that time. Hence the length of time elapsingbetween the time of illumination and of observation would be i…
Physics
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