Duff, A. Wilmer (Alexander Wilmer), b. 1864, ed, Guthe, Karl Eugen, 1866-1915, Hallock, William, 1857-1913, Lewis, E. Percival (Exum Percival), 1863-1925, Goodspeed, Arthur W. (Arthur Willis), b. 1860, Carman, Albert Pruden, b. 1861, McClung, Robert Kenning, 1874- · Philadelphia, P. Blakiston's Son & Co · leaf 421
bright areas projected on a screen through the openings(Fig. 283). These holes decrease regularly in size from i to 9.If the screen be moved (thus changing the number of half-period elements subtended by the holes at the screen) maxima 404 LIGHT. change to minima and vice versa, or if white light… … Fic. 283. than the first two half-period elements, there are no maxima andminima within the illuminated area on the screen, as there can beno possible discordance of phase in the wavelets coming throughthe hole, and consequently a diffuse circular patch of light is caston the screen, which…
Physics
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