The focal length of a concave mirror is 10 cm. Find it's radius of curvature.
Focal length = 12\dfrac{1}{2}21 x Radius of curvature
Given,
f = 10 cm
Substituting the values in the formula above we get,
10=12×radius of curvature⇒radius of curvature=20 cm10 = \dfrac{1}{2} \times \text{radius of curvature} \\[0.5em] \Rightarrow \text{radius of curvature} = 20 \text{ cm}10=21×radius of curvature⇒radius of curvature=20 cm
Hence, radius of curvature of concave mirror = 20 cm.
