A beam of light of λ = 600 n m from a distant source falls on a single slit 1 m m 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:

Question

A beam of light of λ = 600 n m from a distant source falls on a single slit 1 m m 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:, 1.2 c m, 1.2 m m, 2.4 c m, 2.4 m m

MARKS App · Accepted Answer

Angular width of 1 s t maxima 2 θ = 2 λ a Linear width of 1 s t maxima = D 2 θ = 2 λ D a = 2 × 600 × 10 - 9 2 1 × 10 - 3 = 2.4 m m

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