Why is a concave lens also called a diverging lens ?
Hi Mehak Gupta
A concave lens is called a diverging lens as it diverges the light as it thicker at the edges and has a small depression in its centre and if it will be thicker in the middle than at the edges it will converge the light so as concave lens have a small depression in its centre so it refracts or diverges the light outwards.
Cheers