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

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Concave lenses are thinner at the middle. Rays of light that pass through the lens.
Thus they diverge.
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When parallel rays pass through a concave lens . the reflected rays diverge so that they appear to come from one point
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When a parrallel rays of light are allowed to fall on a concave lens the reflected rays appears to be diverged from a point called principal focus
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