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 422
to the slit, and if the wave be divided into half-period elements with respect to points P, Q, etc., on a screen it may beseen from Fig. 286 that at the points P„, P„ P„ P^, etc., in the geometricalshadow each being iX further from O than the preceding point, the ampH-tudes are ^0 = fll 02 -f fls… … Fig. 285. 4o6 LIGHT. the geometrical shadow, but rapidly fades away. Since the half-periodelements of red are larger than those of violet, red penetrates further intothe shade than the other colors, violet the least. This accounts for the .-1Q3
Physics
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