NEET 2014 Physics question
A beam of light of nm from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between first dark fringes on either side of the central bright fringe is
Answer: (4)
Solution
For a single slit of width , the first minimum is at from the centre. The distance between the first dark fringes on either side (the width of the central maximum) is . $=
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