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A concave mirrorr has a focal length `20 cm.` The distance between the two positions of the object for which the image size is double of the object si

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A concave mirrorr has a focal length `20 cm.` The distance between the two positions of the object for which the image size is double of the object size is
A. `20cm`
B. `40cm`
C. `30cm`
D. `60cm`
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1 Answer

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by (90.6k points)
Correct Answer - A
`(v)/(u)=2`
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