The distance between the focus and the pole of the spherical mirror is known as
Answers
The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature.
Answer:
The distance from the pole to the focal point is called the focal length (f). The focal length of a spherical mirror is then approximately half its radius of curvature.
(or)
Light rays that are parallel to the principal axis of a concave mirror converge at a specific point on its principal axis after reflecting from the mirror. This point is known as the principal focus of the concave mirror.
Radius of curvature, R = 20 cm
Radius of curvature of a spherical mirror = 2 × Focal length (f)

Hence, the focal length of the given spherical mirror is 10 cm.