Concave lens is called ___________.

A concave lens is called a diverging lens because:

• It has a shape that causes light to spread out or diverge when it passes through the lens.
• The surface of a concave lens curve inward, causing light rays to refract, or bend, away from each other.
• When light rays pass through a concave lens, they are refracted in such a way that they diverge from a point known as the focal point.