Optics Question 451

Question: A light ray is incident by grazing one of the face of a prism and after refraction ray does not emerge out, what should be the angle of prism while critical angle is C?

Options:

A) Equal to 2C

B) Less than 1C

C) More than 2C

D) None of the above

Show Answer

Answer:

Correct Answer: C

Solution:

[c] From ray diagram $ A-C+\theta $ For TIR at AC $ \theta >C $ So A>2C



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