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Image Formed by a Concave Mirror

A spherical m...

Question

A spherical mirror forms image of the same size when an object is placed at a distance of 8 cm or 16 cm from the mirror. Find the radius of curvature of the mirror. Is the mirror concave or convex?

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Solution

Radius of curvature will be half of the object distance.
$\frac{8}{2} = 4 c m o r \frac{16}{2} = 8 c m$

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