Consider the situation shown in figure. Water `(mu_(W) = (4)/(3))` is filled in a breaker upto a height of 10 cm . A plane mirror 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

Options

A. 15 cm
B. 12.5 cm
C. 7.5 cm
D. 10 cm

Answer

B

Explanation

Initially observer is mirror for image formation of object O. As O is kept at the bottom , then it sees somewhat above the bottom.
`therefore` Distance = `5 + (10)/(mu) = 5 + (10xx3)/(4)`
= 12.5 cm (in front )
Hence image from the mirror after reflection is also at `12.5` cm,