In the diagram, the function of the correcting lens is to

The function of the correcting lens is to converge incoming rays. A lens is a curved piece of glass that can bend or refract light. When light passes through a convex (converging) lens, it is bent inward, causing the rays to converge at a point called the focal point. In the diagram, the correcting lens is a convex lens that is placed after the object and before the image. Its purpose is to converge the rays that have been diverged by the previous lens so that the final image is formed correctly. By bringing the diverging rays back together, the correcting lens helps to produce a clear and sharp image for the viewer.