STANDARDPhysics-Wave Optics
STANDARD Physics Single Slit Diffraction MCQ Question
Type: MCQ-numerical-Medium-Class 12
A narrow slit of width 2 mm is illuminated by monochromatic light of wavelength 500 nm. The distance between the first minima on either side on a screen at a distance of 1 m is
A
5 mm
B
0.5 mm
C
1 mm
D
10 mm
Correct Answer
Option B
Detailed Explanation
The distance between the first minima is given by the formula 2Dλ/a. Substituting the given values: λ = 500 nm = 5 × 10⁻⁷ m, a = 2 mm = 2 × 10⁻³ m, D = 1 m, we find the distance to be 0.5 mm.
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