Question

Which optical device can spread light apart through refraction

Answer 1

CONCAVE

Step-by-step explanation:

Convex lenses bend light rays so they come together at focus. Concave lenses spread light rays apart so they do not come together at a focus.

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Answer 2

Concave lens

Step-by-step explanation:

Concave lenses are thicker at ends and thinner at middle. When parallel rays of light pass through the concave lens, they are refracted and spread out so that they appear to come from a common point known as principle focus. Due to this reason, Concave lens also called as diverging lens.