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Relation between Focal Length and Radius of Curvature

The minimum d...

Question

The minimum distance between the object and the image formed by a concave mirror can be:
(f is the focal length of the mirror)

A

Zero

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B

f

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C

2f

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D

4f

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Solution

The correct option is A Zero
When the object is placed at center of curvature, image will form at center of curvature for a concave mirror, as shown in the figure;Therefore, the minimum distance between the object and the image formed by a concave mirror can be equal to zero.

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