일반물리학 2 — Interference: Problem 66

66 In Fig. 35-34, two light pulses are sent through layers of plastic with thicknesses of either L or 2L as shown and indexes of refraction \(n_1 = 1.55, n_2 = 1.70, n_3 = 1.60, n_4 = 1.45, n_5 = 1.59, n_6 = 1.65,\) and \(n_7 = 1.54\). (a) Which pulse travels through the plastic in less time? (b) What multiple of L/c gives the difference in the traversal times of the pulses?