Question

An object is placed at a distance of 25 cm from the mirror .the mirror produces an image that is 20cm 1) behind the mirror and 2)in front of the mirror for each case find the focal length

Answer 1

When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front of the mirror. When an object is placed at a distance of 15 cm from a concave mirror, its image is formed at 10 cm in front of the mirror.