Question

The refractive index of water with respect to air is $4/3$ . Calculate the refractive index of air with respect to water.

• A. $3/4$
• B. $4/3$
• C. $3/2$
• D. $2/3$

Answer 1

The correct option is A $3/4$

Refractive index of water w.r.t air = $\frac{4}{3}$

We know the relation,

Refractive index of water w.r.t air $=\frac{\text{Refractive index of water}}{\text{Refractive index of air}}=\frac{4}{3}$

Refractive index of air w.r.t water $=\frac{\text{Refractive index of air}}{\text{Refractive index of water}}=\frac{3}{4}$

Therefore, the refractive index of air with respect to water is $\frac{3}{4}$