18_Ch 24 College Physics ProblemCH24 Wave Optics

18_Ch 24 College - 320 CHAPTER 24 24.33 The locations of the dark fringes(minima mark the edges of the maxima and the widths of the maxima equals

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320 CHAPTER 24 24.33 The locations of the dark fringes (minima) mark the edges of the maxima, and the widths of the maxima equals the spacing between successive minima. At the locations of the minima, ( ) sin m ma θ λ = and () 9 -3 tan sin 500 10 m 1.20 m 1.20 mm 0.500 10 m mmm yL L m L a mm θθ   =≈=     × == × ( Then, ) 1.20 mm ym ∆=∆ and for successive minima, 1 m = . Therefore, the width of each maxima, other than the central maximum , in this interference pattern is ( ) width 1 1.20 mm 1.20 mm y =∆ = = 24.34 At the positions of the minima, ( ) sin m = and ( ) tan sin L m m La = =≈ Thus, ( ) ( ) 31 2 yy λλ −=− = and ( )( ) 9 3 2 0.500 m 680 10 m 2 3.00
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This note was uploaded on 12/09/2011 for the course PHYS 2020 taught by Professor Staff during the Fall '10 term at FIU.

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