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A convex lens of focal length 20cm and a...

A convex lens of focal length 20cm and another plano convex lens of focal length 40cm are placed co-axially . The plano convex lens is silvered on plane surface. What should be the distance (in cm) so that final image of the object 'O' is formed on O itself.

A

10

B

15

C

20

D

25

Text Solution

Verified by Experts

The correct Answer is:
C
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