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Consider the situation shown in figure. ...

Consider the situation shown in figure. Water `(mu=4//3)` is filled in a beaker up to a height of 10cm.
A plane mirror is fixed at a height of 5 cm from the surface of water. Distance of image from the mirror after reflection from it of an object O at the bottom of the beaker is

A

15cm

B

12.5cm

C

7.5cm

D

10cm

Text Solution

Verified by Experts

The correct Answer is:
B
Distance of first image `(I_(1))` formed after refraction from the plane surface of water is
`(10)/(4//3)=7.5cm`
from water surface `(d_(app)=(d_(actual))/(mu))`.
Now, distance of this image is `5+7.5=12.5cm` from the plane mirror. Therefore, distance of second image `(I_(2))` will also be equal to 12.5 cm from the mirror.
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