Question

A lens bounded by two spherical surfaces curved inwards is

• A. double concave
• B. double convex
• C. plano-concave
• D. plano-convex

Answer 1

The Correct Option is A

A lens that has two spherical surfaces both curved inwards is known as a double concave lens. In this type of lens, both surfaces are concave, meaning they curve inward toward the center of the lens. This causes the light to diverge as it passes through. In contrast, a double convex lens has both surfaces curved outward, while plano-concave and plano-convex lenses have one flat surface and one curved surface. Thus, the correct answer is double concave.

The correct option is (A): double concave