Geometrical OpticsHard
Question
A narrow slit of width 1 mm is liiuminated by monochromatic light of wavelength 600 nm. The distance between the first minima on either side of a screen at a distance of 2 cm is
Options
A.1.2 cm
B.1.2 mm
C.2.4 cm
D.2.4 mm
Solution
For first dark fringe on either side d sin θ = λ
or
∴ 
Therefore, distance between two dark fringes on either side =
Substituting the values, we have
distance
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