Optics Question 967
Question: For total internal reflection to take place, the angle of incidence i and the refractive index $ \mu $ of the medium must satisfy the inequality
[MP PET 1994]
Options:
A) $ \frac{1}{\sin i}<\mu $
B) $ \frac{1}{\sin i}>\mu $
C) $ \sin i<\mu $
D) $ \sin i>\mu $
Show Answer
Answer:
Correct Answer: A
Solution:
For total internal reflection i > C
$ \Rightarrow \sin i>\sin C\Rightarrow \sin i>\frac{1}{\mu }\Rightarrow \frac{1}{\sin i}<\mu . $
