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A concave mirrorr has a focal length 20 ...

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`

Text Solution

Verified by Experts

The correct Answer is:
A
`(v)/(u)=2`
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