Question

If the image of an object held at a distance 4
cm from the focus of a spherical mirror is
formed at 25 cm from the focus. The focal
length of the mirror must be-
1
100 cm
2
20 cm
3 10 cm
4
25 cm​

Answer 1

Explanation:

if the image of an object held at the distance 4 cm from the focus of the spherical mirror is formed at 25 from the focus the focal length of the must by 100 cm