1079_Physics ProblemsTechnical Physics

1079_Physics ProblemsTechnical Physics - 420 Diffraction...

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420 Diffraction Patterns and Polarization P38.36 2 2 101 2 9 28 1 5 0455 dm d m sin sin . sin . . θλ λ θ =⇒ = = ° = af a f nm nm P38.37 2 sin = : sin . . . == × × = m d 2 10140 10 20281 10 0249 9 9 m m ej and 14 4 . P38.38 sin m m d = 2 : sin . . 12 6 1 2 0218 °= = d sin . 2 2 2 20218 d a f so 2 25 9 . Three other orders appear: 3 1 30 2 1 8 4 0 9 = ° sin . . 4 1 5 1 40 2 1 8 6 0 8 50 2 1 8 = ° = sin . . sin . nonexistent P38.39 Figure 38.27 of the text shows the situation. 2 sin = or = 2 d m sin m = 1 : 1 2 2 80 80 0 1 551 = ° = .s i n . . m m m = 2 : 2 2 2 80 80 0 2 276 = ° = i n . . m m m = 3 : 3 2 2 80 80 0 3 184 = ° = i n . . m m Section 38.6 Polarization of Light Waves P38.40 The average value of the cosine-squared function is one-half, so the first polarizer transmits 1 2 the
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