Question

a point object is 24 cm above the surface of water u =4/3 in a lake. find the position of point object from the surface of the water with respect to fish inside the water .​

Answer 1

Explanation:

A fish inside the water observes the object to be at a height of 18 cm above the surface of the water.

(B) is correct option.

Explanation:

Given that,

Refractive index \mu=\dfrac{4}{3}μ=

3

4

Distance of object = 24 cm

We need to calculate the apparent distance

Using formula of apparent distance

\mu=\dfrac{D}{d}μ=

d

D

Where, d = apparent distance

D = real distance

Put the value into the formula

\dfrac{4}{3}=\dfrac{24}{d}

3

4

=

d

24

d=\dfrac{3}{4}\times24d=

4

3

×24

d=18\ cmd=18 cm

Hence, A fish inside the water observes the object to be at a height of 18 cm above the surface of the water.

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