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 415
d = n(AB + BC) — ti.AP.But AC sin i = AP ; AC sin r = CQ ; therefore, sin t AP = CQ CQ 398 LIGHT. … Fig. 277. hence d = n(AB + BC— CQ) = n(AB-\- BQ) = nAR cos r = znt cos r. If the film is of air, n= i,d ^ 2t cos i (if i is the angle ofrefraction in air). The effectsat S and 5i are due to the super-position of all the componentsarising from multiple reflectionswithin the films. Between…
Physics
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