An equiconvex lens is cut into two identical plano convex lens

CBSE Class 12
1

An equiconvex lens is cut into two identical plano convex lens. What is the ratio of focal lengths of equiconvex lens to that of plano convex lens…?

2

Let the focla legth of the equiconvex lens be f and of each identical plano convex lens be f’
For the equiconvex lens, the focal length is
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