concave

Discussion in 'Wiki' started by seanandkate, Aug 20, 2010.

  1. seanandkate

    seanandkate Well-Known Member Fight Leukemia

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    Lenses are classified by the curvature of the two optical surfaces. Also called a "diverging lens" because it diverges parallel rays outward. A convex lens pinches inward toward the centre of the lens. When this curve occurs on both sides of a lens it is called "biconcave" and when it occurs on a single side it is called "plano-concave".

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