Question

A convex lens of focal length 25cm and a concave lens of focal length is 10cm is placed in closed contact with each other, calculate the lens power of this combination​

Answer 1

Answer:

F1=25. F2=-10

1/f= 1/F1 +(-1/F2)

1/f=1/25-1/10

=2-5/50

1/f=3/50

f=-50/3

Explanation:

p= 1/f

=-3/50