The focal length of a convex mirror is 12.5 cm. How far is its centre of curvature from the pole and the focus?

A
$25 cm, 12.5 cm$ , respectively
B
$35 cm, 12.5 cm$ , respectively
C
$45 cm, 12.5 cm$ , respectively
D
$55 cm, 12.5 cm$ , respectively

Solution:

The centre of curvature of the mirror is

25 cm

from the pole and

12.5 cm

from the mirror's focus.
[2]"The centre of curvature of a spherical mirror is always located at a distance equal to its radius of curvature from its pole." "The radius of curvature of a spherical mirror is twice its focal length." So, the centre of curvature is