What happens to light rays when they are refracted through a lens?

When light rays pass through a lens, they undergo refraction, which is the bending of light as it travels from one medium to another with a different density. Lenses are specifically designed to alter the path of incoming light rays, causing them to change direction. This redirection of light rays is fundamental to the function of lenses, whether they are converging (convex) or diverging (concave).

In converging lenses, the rays that enter parallel to the optical axis are focused to a point, while in diverging lenses, the rays are spread out as if they were emanating from a point behind the lens. This change in direction allows lenses to form images, correct vision, and enhance visual clarity. Understanding how light refracts through lenses is vital for both optical design and effective vision correction.