310CHAPTER 24 (b) The next minimum encountered is the 2m=minimum; and at that point, 15sin22dmδθλ==+=λor ()11555.7m5sinsin300mdθ−−(27.7=°Then, )1000 m tan27.7524 y=°m=so the car must travel an additional 124 m 24.8In a double-slit interference pattern the distance from the central maximum to the position of the order bright fringe is given by thmmymLd=where dis the distance between the splits and Lis the distance to the screen. Thus, the spacing between the first- and second-order bright fringes is ( )9360010m2.50 m10.0300 m3.00 cm0.05010mLd−−×= −===×21yy y∆= −24.9The path difference in the two waves received at the home is
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