Optics Question 977
Question: A ray of light propagates from glass (refractive index = 3/2) to water (refractive index = 4/3). The value of the critical angle
[JIPMER 1999; UPSEAT 2001; MP PMT 2000, 03]
Options:
A) sin-1(1/2)
B) $ {{\sin }^{-1}}( \frac{\sqrt{8}}{9} ) $
C) $ {{\sin }^{-1}}(8/9) $
D) $ {{\sin }^{-1}}(5/7) $
Show Answer
Answer:
Correct Answer: C
Solution:
$ C={{\sin }^{-1}}( \frac{1}{ _{w}{\mu _{g}}} )={{\sin }^{-1}}( \frac{{\mu _{w}}}{{\mu _{g}}} )={{\sin }^{-1}}( \frac{8}{9} ) $
