If the distance of a point on the screen from the two sources is 1.8 x 10 m and 1.23 × 10-5 m and wavelength of light used is 6000 Å then, it is (a) 9th dark fringe (b) 10th dark fringe (c) 10th bright fringe (d) 11th dark fringe A B X₁ D- P(point) Screen
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