Question

double convex lens is cut into two equal pieces A and B by a plane containing principal Axis the piece b is further cut into two pieces c and d by another plane perpendicular to the principal Axis of the focal power of the original and safety and those of a and c are​

Answer 1

Explanation:

Double convex lens is cut into two equal pieces A and B by a ... principal Axis the piece b is further cut into two pieces c ...