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A parallel beam of light of lambda = 5 x...

A parallel beam of light of `lambda = 5 xx 10^(-7)` m is incident normally on a narrow slit of width 0.2 mm. The diffraction pattern is observed on a screen at the focal plane of a convex lens of f = 50 cm. Find the distance between the first two minima and the first two maxima on the screen.

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