Question

What are Bi-concave Lens?

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Answer 1

Bi-concave lenses have two inward curved surfaces. These lenses have a negative focal length. ... They are used to diverge incoming light or increase the focal length of an existing optical system.

Answer 2

Answer:

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Bioconcave - A lens in which both sides are concave is biconcave. Biconcave lenses are diverging lenses.