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A plano-convex glass lens (mu(g)=3//2) o...

A plano-convex glass lens `(mu_(g)=3//2)` of radius of curvature` R=10cm` is placed at a distance of b from a concave lens of focal length 20cm. What should be the distance a of point object O from the plano-convex lens so that position of final image is independent of b?

A

20 cm

B

30 cm

C

40 cm

D

60 cm

Text Solution

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The correct Answer is:
B
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