Question

A 30cm high bucket is completely filled with a liquid. A coin at its bottom appears to be raised by 12cm. The refractive index of the liquid is?

Answer 1

The refractive index of the liquid is 1.7.

Explanation:

To calculate the refractive index use the formula as

$\mu=\frac{R}{A}$

Here, R is the real depth and A is the apperent depth.

Given the real depth of water in bucket is R = 30 cm.

The apparent depth of water in bucket A = (30 cm - 12 cm ) = 18 cm.

substitute these values in above formula, we get  

$\mu=\frac{30cm}{18cm}$

$\mu=1.66=1.7$.

Thus, the refractive index of the liquid is 1.7.

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