Question

A convex lens and a concave lens having same focal length 'f' are combined to form a new lens what is the power of the combination?​

Answer 1

Answer:

P = 0D

Explanation:

Effective power of a combination of lenses,

$P_{net} = P_{1} + P_{2}$

P for a convex lens = +P

P for a concave lens = -P

Pnet = 0 D