Question

Two lenses have powers of +2D and -4D. What is the nature and focal length of the combination

of two lenses.​

Answer 1

Answer:

Photo synthesis is the process by which green plants make their own food and

Answer 2

Answer:

Explanation:

Two lenses are given having power of +2D and - 4D. The power of a convex lens is positive while the power of a concave lens is negative.

Focal length of lens 1,=0.5m

Focal length of lens 2,=0.25m