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Image for In a Young's double-slit experiment, the seventh dark fringe is located 0.030 m to the side of the central briIn a Young's double-slit experiment, the seventh dark fringe is located 0.030 m to the side of the central bright fringe on a flat screen, which is 1.0 m away from the slits. The separation between the slits is 1.5

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Answer #1

we have L = 1.0 m , d= 1.5*10-4m


Xn=?x(n-1/2) , n is seven


0.030=[L?/d]*6.5


? = .030*d / 6.5 L


?=6.923 *10-7 m = 692.3 nm

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