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} $



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