A beam of light of wavelength 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 the first dark fringes on either side of the central bright fringe is

Question

A beam of light of wavelength 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 the 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

The distance between the first dark fringes is equal to width of central bright 2 D λ a = 2 × 600 × 10 - 9 × 2 10 - 3 = 2 . 4 × 10 - 3 m = 2 . 4 mm

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