Question

uses of a concave lens

Answer 1

optician use concave lens to correct nearsightedness cameras manufacturers use convex and concave lenses to improve the quality of photographs concave lenses are used in flashlight to widen The Beam produced by bulb

Answer 2

Explanation:

convex lens of focal length 10 cm is in contact with a concave lens. The focal length of the combination is numerically equal to that of the concave lens. The focal length of the concave lens is