Question

Two convex lenses A and B of focal length 0.3 m and 0.2 m respectively, are

placed in contact. Calculate the effective focal length and the power of the

combination. If B is a concave lens, what is the effective focal length and

the power?​

Answer 1

Answer:

25/3 D

Explanation:

P  net  = P1  + P2

​ =  10/3 + 10/2 = 10 5/6

P net = 25/3 D