Question

Power of convex lens is positive or negative

Answer 1

Answer:

Explanation:

The power of a convex lens is positive as a convex lens has a positive focal length, while the power of a concave lens is negative as concave lens has a negative focal length

Answer 2

Focal length of a converging i.e. convex lens is considered positive and focal length of a diverging lens i.e. concave lens is negative. Therefore power of a convex lens e is positive and that of a concave lens e is negative. Hence, if power is negative this means focal length is negative and we have a diverging lens