Optics Question 722
Question: The refractive indices of glass and water w.r.t. air are 3/2 and 4/3 respectively. The refractive index of glass w.r.t. water will be
[MNR 1990; JIPMER 1997, 2000; MP PET 2000]
Options:
A) 8/9
B) 9/8
C) 7/6
D) None of these
Show Answer
Answer:
Correct Answer: B
Solution:
$ _{a}{\mu _{g}}=\frac{3}{2}, _{a}{\mu _{w}}=\frac{4}{3} $
$ \therefore $ $ _{w}{\mu _{g}}=\frac{ _{a}{\mu _{g}}}{ _{a}{\mu _{w}}}=\frac{3/2}{4/3}=\frac{9}{8} $
