Question

The refractive index of water with respect to air is 1.33. The refractive index of air with respect to water will be

• A. $0.25$
• B. $0.50$
• C. $1.00$
• D. $0.75$

Answer 1

The correct option is D

$0.75$

Step 1: Given a parameter

The refractive index of water with respect to air($n_a^w$) = $1.33$

Step 2: Formula used
The refractive index of air with respect to water ($n_w^a$)=$\frac{1}{n_a^w}$

Step 3: Calculation

By substituting the given value in the above question, we get

$n_w^a=\frac{1}{1.33}$

$n_w^a=0.75$

Therefore, The refractive index of air with respect to water will be $0.75$.

Hence, option D is correct.