If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good

1. 

If f1 and f2 are the distances from the optical centre of a convex lens of focal length f to conjugate two points P1 and P2 respectively, the following relationship holds good
[A]. f = f1 + f2
[B]. f = 1by2 (f1 + f2)
[C]. 72-3.307-1
[D]. none of these.

Answer: Option C

Explanation:

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