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.