Question

1. An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is * 1 point – 15 cm – 30 cm 30 cm 15 cm

Answer 1

Explanation:

The focal length of mirror is 15 cm.

As object and image are located at the same point and in front of concave mirror then we take u = +30 cm and v = + 30 cm. f = + 15 cm. Thus, the focal length of mirror is 15 cm.