KCET 2021 Physics Solved Paper

Question : 9 of 60

Marks: +1, -0

Two thin biconvex lenses have focal lengths f1 and f2. A third thin biconcave lens has focal length of f3 . If the two biconvex lenses are in contact, then the total power of the lenses is P1. If the first convex lens is in contactwith the third lens, then the total power is P2. If the second lens is in contact with the third lens, the total power is P3. then