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Computer Applications

The focal length of a concave mirror is 10 cm. Find it's radius of curvature.

Reflection of Light

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Answer

Focal length = 12\dfrac{1}{2} 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}

Hence, radius of curvature of concave mirror = 20 cm.

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