Optics Question 989

Question: A normally incident ray reflected at an angle of 90o . The value of critical angle is

[RPMT 1996]

Options:

A) 45o

B) 90o

C) 65o

D) 43.2o

Show Answer

Answer:

Correct Answer: B

Solution:

Critical angle C is equal to incident angle if ray reflected normally

C=90o



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