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1043_Physics ProblemsTechnical Physics

# 1043_Physics ProblemsTechnical Physics - 384 P37.4...

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384 Interference of Light Waves P37.4 λ = = = v f 354 2 000 0 177 1 m s s m . (a) d m sin θ λ = so 0 300 1 0 177 . sin . m m a f a f θ = and θ = ° 36 2 . (b) d m sin θ λ = so d sin . . 36 2 1 0 030 0 °= m b g and d = 5 08 . cm (c) 1 00 10 36 2 1 6 . sin . × °= m e j a f λ so λ = 590 nm f c = = × × = λ 3 00 10 5 90 10 508 8 7 . . m s m THz P37.5 In the equation d m sin θ λ = + F H G I K J 1 2 . The first minimum is described by m = 0 and the tenth by m = 9 : sin θ λ = + F H G I K J d 9 1 2 . Also, tan θ = y L but for small θ , sin tan θ θ . Thus, d L y = = 9 5 9 5 . sin . λ θ λ d = × × = × = 9 5 5 890 10 2 00 7 26 10 1 54 10 1 54 10 3 3 . . . . . m m m m mm e j a f . L d Source y FIG. P37.5 P37.6 λ = = 340 2 000 0 170 m s Hz m . Maxima are at d m sin θ λ = : m = 0 gives θ = ° 0 m = 1 gives sin . θ λ = = d 0 170 m 0.350 m θ = ° 29 1 . m =
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