Question

The refractive indices of water and glass relative to air are $\frac{4}{3}$ and $\frac{3}{2}$ respectively. The refractive index of glass relative to water will be:

• A. $(\frac{4}{3}+\frac{3}{2})$
• B. $(\frac{3}{2}-\frac{4}{3})$
• C. $(\frac{3}{2}\times \frac{4}{3})$
• D. $(\frac{3}{2}÷\frac{4}{3})$

Answer 1

Answer: (D)

$(\frac{3}{2}÷\frac{4}{3})$

The refractive index of water relative to air is,

${\mu }_w^a=\frac{4}{3}$ and

Refractive index of glass relative to air is,

${\mu }_g^a=\frac{3}{2}$

Therefore the refractive index of glass relative to water will be,

${\mu }_g^w=\frac{3}{2}÷\frac{4}{3}$