What type of lens diverges light rays?

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A concave lens is designed to diverge light rays that pass through it. When parallel light rays enter a concave lens, the lens causes them to spread out or diverge. The focal point of a concave lens is virtual, meaning that the light rays appear to originate from a point on the same side of the lens as the incoming light. This property makes concave lenses useful in various applications, such as in glasses for nearsightedness, where they help correct vision by diverging the light before it reaches the eye, allowing the individual to see distant objects more clearly.

In contrast, a convex lens converges light rays, bringing them to a focal point on the opposite side of the lens. A flat lens does not have a significant curvature to either converge or diverge light effectively, and a bifocal lens is designed to provide two different focal lengths, typically for correcting both near and far vision, rather than solely diverging light rays.