Question

Select the most appropriate word from the given box and fill in the following blanks.

refracted diameter converging power convex small concave dioptre diverging focal length two aperture

A ______ lens is thin at the centre and thick at the edges.

Answer 1

A concave lens is thin at the centre and thick at the edges.

Explanation:

A concave lens is thinner in the middle and thicker at the edges, which causes parallel light rays passing through it to diverge.