STANDARDPhysics-Optics
STANDARD Physics Critical Angle and Total Internal Reflection MCQ Question
Type: MCQ-numerical-Medium-Class 12
Critical angle for light going from medium (A) to (B) is θ. The speed of light in medium (A) is v, then the speed of light in medium (B) is
A
v(1 − cos θ)
B
v/sin θ
C
v/cos θ
D
v/(1 − sin θ)
Correct Answer
Option B
Detailed Explanation
Using the relation sin θ = μB/μA = v'/v, the speed of light in medium (B) is v' = v/sin θ.
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