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A point object is placed at the focus of...


A point object is placed at the focus of the bio-conved lens. What should be the value of `X`, so the final image forms at infinity?

A

10 cm

B

20 cm

C

15 cm

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B


The final image will be at infinity only, if the foci of lens and mirror coincides. The situation could be understood on the basis of given diagram.
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