Question

If an object is 15cm away from the mirror find the distance between object and image

Answer 1

Explanation:

Assuming that the mirror is a plane mirror

if the distance between the image and the object is 15 cm, the object is 15/2 = 7.5 cm in front of the mirror.

If the object moves 3 cm towards the mirror, its distance from the mirror = 7.5–3 = 4.5 cm and so the distance between the image and the object = 2*4.5 = 9 cm. Answer