Ray Optics and Optical Instruments Part 2

As shown in the figure, a plane mirror is fixed at a height of 50‌cm from the bottom of tank containing water (µ=‌

4

3

). The height of water in the tank is 8‌cm. A small bulb is placed at the bottom of the water tank. The distance of image of the bulb formed by mirror from the bottom of the tank is ________ cm.