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Real image of an object are formed on th...

Real image of an object are formed on the fromed on the two positions of a lens separated by a distance`60cm`
`If the distance between object and screen is`180cm`then ,the focal length of the lens is:

A

`40cm`

B

`25cm`

C

`14cm`

D

`20cm`

Text Solution

Verified by Experts

The correct Answer is:
A
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