STANDARDPhysics-Wave Optics
STANDARD Physics Young's Double Slit Experiment MCQ Question
Type: MCQ-numerical-Medium-Class 12
In a Young's double slit experiment, the angular width of a fringe formed on a distant screen is 1°. The slit separation is 0.01 mm. The wavelength of the light is
A
0.174 nm
B
0.174 Å
C
0.174 μm
D
0.174 × 10⁻⁴ m
Correct Answer
Option C
Detailed Explanation
Angular fringe width, θ = λ/d. Given d = 0.01 mm = 10⁻⁵ m, θ = 1° = π/180 radians. Therefore, λ = π/180 × 10⁻⁵ = 1.74 × 10⁻⁷ m = 0.174 μm.
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