Question

A coin is placed inside beaker, containing water to a height of 2 m. What is the apparent depth of the coin from the surface of water? (R.I. of water )

Answer 1

Find:

Apparently depth?

Explanation:

The coin is placed inside the beaker, so it is at a depth of 2m.

Real depth of the coin is 2m..

But, for an observer from the surface, it seems to be different(Apparently depth)

(refer image)

.Hope it is helpful

Answer 2

Answer:

The apparent depth of the coin from the surface of water is 1.5m

Explanation:

Given:

Real depth=2m

Refractive Index of water=4/3

To find:
The apparent depth of the coin from the surface of water=?
Solution:

We know that,

$RI=\frac{real depth}{apparent depth}$

∴$\frac{4}{3}=\frac{2}{apparent depth}$

∴Apparent depth=2*3/4=1.5m

Therefore, when a coin is placed inside beaker, containing water to a height of 2m the apparent depth of the coin from the surface of water is 1.5m