What does a concave lens do to light rays?

A concave lens is designed to spread out light rays that pass through it. This lens has a surface that curves inward, which means that when parallel light rays hit the lens, they are refracted outward rather than converging. As the light rays exit the lens, they appear to diverge from a single point known as the focal point, which is located on the same side as the light source. This property is utilized in various optical devices, such as eyeglasses for nearsightedness and certain types of cameras.

The correct answer highlights the fundamental behavior of concave lenses in optics, emphasizing their role in diverging light rather than converging it, increasing light intensity, or reflecting light like a mirror.