Question

Relation between focal length and radius of curvature of a spherical mirror is
R
1
2
a) f =
b)
c) 21 = R
2
f
R
d) ALL​

Answer 1

Relation between ‘Focal Length’ and ‘Radius of Curvature of a Spherical Mirror :

$\longrightarrow \sf{\underline{\boxed{\sf{f=\dfrac{R}{2}}}}\: \: OR \: \: \underline{\boxed{\sf{R=2f}}}$

Where,

• f = Focal length or of the spherical Mirror.
• R = Radius of curvature of the spherical Mirror.

Focal length :

The distance of principal focus from the pole of the spherical mirror is called focal length of the mirror.

Radius of curvature :

The radius of curvature of a spherical mirror is the radius of a sphere of which the mirror forms a part.