A fish at a depth of 12 cm in water is viewed by an observer on the bank of a lake. To what height the image of the fish is raised ? (Refractive index of lake water = 4/3)

Options

A. 9 cm
B. 12 cm
C. `3.8 cm`
D. 3 cm

Answer

D

Explanation

Apparent rise `= d (1- (1)/( a m u _(w))) = 12 xx (1- ( 3)/(4))`
` =12 xx (1)/(4) = 3 cm`