Question

determination of the focal length of a convex lens what is athe average focal length of the lens f1 and f2​

Answer 1

Answer:

I think the question is incomplete

it needs a diagram

Answer 2

Answer:

I guess there is a diagram to this question....or some other vital information must be given.The question has asked us to find focal lengths of lens f1 and f2.....but no information about the image distance or the object distance or the magnification is given.Perhaps,It cannot be answered unless you post the question properly.