Question

what is a lens? a straight transparent material that absorbs light a curved transparent material that blocks light a curved transparent material that refracts light

Explanation:

A lens is a curved transparent material. It refracts light. Refraction is the bending of light as it passes through a medium. Lenses are used in various optical devices like glasses, cameras, and telescopes. The first option mentions a straight material (incorrect as lenses are curved). The second option says it blocks light (incorrect, it refracts). The third option is correct as it's a curved transparent material that refracts light.

Answer:

A curved transparent material that refracts light.