Question

As seen from above, the apparent depth of a liquid in a vessel is $15cm$, when its real depth is $20cm$. Find the refractive index of the liquid.

• A. 1.25
• B. 1.33
• C. 1.5
• D. 1.45

Answer 1

The correct option is B

1.33

Let the refractive index of water be $\mu$

We know that,
Refractive index of the liquid $=\frac{\text{Real depth}}{\text{Apparent depth}}$
$\mu =\frac{20}{15}=1.33$
Hence, the correct option is B.