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Computer Applications

The radius of curvature of a convex mirror is 40 cm. find it's focal length.

Reflection of Light

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Answer

Focal length = 12\dfrac{1}{2} x Radius of curvature

Given,

R = 40 cm

Substituting the values in the formula above we get,

Focal length=12×40Focal length=20 cm\text{Focal length} = \dfrac{1}{2} \times 40 \\[0.5em] \text{Focal length} = 20 \text{ cm}

Hence, focal length of the convex mirror = 20 cm.

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