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Q.

A beam of light wavelength 600 nm from a distant source falls on a single slit 1.00 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance (in mm) between the first dark fringes on either side of the central bright fringe is

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answer is 2.

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Detailed Solution

Required distance $= 2 \times \frac{Dλ}{d} = \frac{2 \times 2 \times 600 \times 10^{- 9}}{1 \times 10^{- 3}} m = 2 .4 mm$

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