A thin double convex lens is cut into tow equal pieces A and B by a plane containing principal axis . The piece B is further cut into two more pieces C and D by another plane perpendicular to the lens principal axis. If the focal power of the original lens is P, then those of A and C are

A thin double convex lens is cut into tow equal pieces A and B by a pl

1.	A thin double convex lens is cut into tow equal pieces A and B by a plane containing principal axis . The piece B is further cut into two more pieces C and D by another plane perpendicular to the lens principal axis. If the focal power of the original lens is P, then those of A and C are
Answer» <P>`P,P/4` `P,P/2` `P/2,2P` `P/2,P/4` ANSWER :B