STANDARDPhysics-Optics
STANDARD Physics Critical Angle and Total Internal Reflection MCQ Question
Type: MCQ-conceptual-Medium-Class 12
Critical angle of glass is θ₁ and that of water is θ₂. The critical angle for water and glass surface would be (μg = 3/2, μw = 4/3)
A
less than θ₂
B
between θ₁ and θ₂
C
greater than θ₂
D
less than θ₁
Correct Answer
Option C
Detailed Explanation
Since μg > μw, the critical angle for the water-glass surface will be greater than θ₂. This is because the critical angle is inversely related to the refractive index.
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