AIPMT | 2014Wave OpticsMedium
Question
A beam of light of λ = 600 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
Options
A.1.2 cm
B.1.2 mm
C.2.4 cm
D.2.4 mm
Solution
Distance between 1st order dark fringes = width of principal max
x =
= 2400 × 10-6
= 2.4 × 10-3 m = 2.4 mm
x =
= 2400 × 10-6
= 2.4 × 10-3 m = 2.4 mm
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