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 concave lens is called a ______ lens and a convex lens is called a ______ lens.

Answer 1

A concave lens is called a diverging lens and a convex lens is called a converging lens.

Explanation:

A concave lens diverges parallel light rays falling on it, so it is called a diverging lens. A convex lens converges parallel light rays falling on it to a point, so it is called a converging lens.