Question

You are given three lenses.

i) a concave lens of focal length 25 cm.

ii) a convex lens of focal length ¼ m and

iii) a convex lens of focal length 100 cm.

Which combination out of these three lenses will form a lens of zero power?​

Answer 1

Answer:

A concave lens of focal length 25cm and a convex lens of focal length 1/4metre will form a lens of zero power