# A parallel beam of light travelling in water $(\mu =\large\frac{4}{3})$ is refracted through a spherical air bubble of radius R .. Find the location of image formed after refraction at two surfaces.

(a) at $P_2$

(b) at $\large\frac{3R}{2}$ from $P_2$ towards left

(c)at $\large\frac{5R}{2}$ from $P_2$ towards right