Question

A plano concave lens has two curved surfaces is it true

Answer 1

Answer:

false answer

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Answer 2

Answer:

If both surfaces have the same radius of curvature, the lens is equiconvex. A lens with two concave surfaces is biconcave (or just concave). If one of the surfaces is flat, the lens is plano-convex or plano-concave depending on the curvature of the other surface.

Explanation:

A single piece of glass that curves outward and converges the light incident on it is also called a convex lens. They are both thicker in middle than near the edges. A lens bound by two spherical surfaces curved inwards is called a bi-concave lens or simply a concave lens