A equiconvex lens has a focal length f and power P It is cut into two symmetrical halves by a plane normal to shown in figure i

Question

A equiconvex lens has a focal length f and power P It is cut into two symmetrical halves by a plane normal to shown in figure i The two pieces are recombined as shown in figure ii Then the power of the combination is OD DO i ii Zero P 2

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