Question

A converging mirror forms a real image of height 4cm ,of an object of height 1cm placed 20cm away from the mirror. Calculate the real image distance. What is the focal length of the mirror

Answer 1

Answer:

Magnification m = - vu - 4 = - v- 20 v = - 80 cm From mirror formula 1v + 1u = 1f 1- 80 + 1- 20 = 1f 1f = 1 + 4- 80 f = - 16 cm Thus focal length