In the given figure ABC is a right angled isosceles prism kept in air. A ray of light is incident on it normally as shown in figure. Refractive index of the prism is varying with time t as μ = 1 + 0.4 t here t is in seconds. The angular velocity of the emergent ray at time t = 1 sec is –
Text Solution
Verified by ExpertsThe correct answer is:
C
sin e = (1 + 0.4 t) × sin 45º
cos e × 
= 
× 0.4
at t = 1 sec μ = 1.4 ∴ sin e = 
cos e = 0.141 ∴ 
= 
× 
= 2 rad/sec.
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