Which lens is called a diverging lens?Concave lens is called a diverging lens. The working of the lens is dependent on the refraction of the light rays as they pass through the lens. A light ray entering a concave lens diverges making the lens act like a diverging lens. The ray of light after passing through the lens bends away from the central axis.
Concave lens is thinner in the middle and thicker at the edges. The shape of the lens is made in such a way that all the rays of light entering parallel to the axis appear to originate from the same point called focus. Concave lens is used to magnify images in telescopes and binoculars.