a beam of light of Lambda 600 NM from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on the screen to metre away the distance between first dark fringes on either side of the central bright fringe.calculate it.
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distance between first dark fringes on other side of the central bright fringe = width of Central bright fringe .
= 2 × lemda × D /d
= 2× 6 × 10 ^-7 × 2 / 1 × 10 ^-3 m
= 24 × 10 ^-4
= 2.4 × 10^-3m
= 2.4 mm
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