For spherical mirrors, the radius of curvature $R$ and focal length $(f)$ are correlated as

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

R = f / 2

R = f / 2

F = 2 R

R = 2 f

answer is D.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

For spherical mirrors, the radius of curvature

R

and focal length

f

is correlated as

R = 2 f

.
A spherical mirror's radius of curvature is twice its focal length. The focus is located in the centre of the radius of curvature. A spherical mirror's focal length

(f)

is the distance between the principal focus and the spherical mirror's pole. The principal focus is the point at which rays parallel to the principal axis meet after being reflected by the mirror.
The following is the relationship between focal length and radius of curvature: