Question

7.
A converging lens of focal length 5 cm is placed in contact with another coverging lens of focal
length of 10 cm. The combined focal length of system is
(A) + 15 cm
(B)- 15 cm
10
10
- cm
(C) cm
3
(D) + 3 cm​

Answer 1

Answer:

Therefore the combined focal length F is given bythe combination behaves as a converging lens of focal length 10 cm.