A beaker contains water up to a height `h_1 ` and K oil above water up to another height `h_2.` Find the apparent shift in the position of the bottom of the beaker when viewed from above. Refractive index of water is `mu_1` and that of K.oil is mu_2`.

Explanation

The apparent shift of the bottom due to the water is `/_\t_1=(1-1/mu_1)h_1`
and due to the K.oil is
`/_\t_2=(1-1/mu_2)h_2`
the total shift `=/_\t_1+/_\t_2(1-1/mu_1)h_1+(1-/mu_2)h_2`