Section-E: Numerical Problems
A concave mirror with its optic axis vertical and mirror facing upward is placed at the bottom of the water tank. The radius of curvature of mirror is 40 cm and refractive index for water μ = 4/3. The tank is 20 cm deep and if a bird is flying over the tank at a height 60 cm above the surface of water, the position of image of a bird is at v = 1.25y cm from water surface. Calculate y.