1058_Physics ProblemsTechnical Physics

# 1058_Physics ProblemsTechnical Physics - Chapter 37 P37.52...

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Chapter 37 399 P37.52 For destructive interference, the path length must differ by m λ . We may treat this problem as a double slit experiment if we remember the light undergoes a π 2 -phase shift at the mirror. The second slit is the mirror image of the source, 1.00 cm below the mirror plane. Modifying Equation 37.5, y m L d dark m m m mm = = × × = λ 1 5 00 10 100 2 00 10 2 50 7 2 . . . e j a f e j . P37.53 2 15 0 30 175 2 2 . . km km a f + = h 15 0 227 63 1 62 2 2 . . . km km a f + = = h h FIG. P37.53 P37.54 For dark fringes, 2 nt m = λ and at the edge of the wedge, t = 84 500 2 nm a f . When submerged in water, 2 nt m = λ m = 2 1 33 42 500 500 . a fa fa f nm nm so m + = 1 113 dark fringes . FIG. P37.54
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