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In a biprism experiment, the distance between the slit and the eyepiece is 1 m. When a convex
lens is introduced between the slit and the cyepiece, images of tthe slit in the two positions of
the lens are 2 x 103 m and 4.5 x 103 m apart. If A = 6000 A°, find the distance between the
4 bright band on one side and the 4th dark band on the other side of the central bright band

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