Lens (geometry)

In geometry, a lens is a convex shape comprising two circular arcs, joined at their endpoints. If the arcs have equal radii, it is called a symmetric lens.The corresponding shape is the lune. The Vesica piscis is one form of a symmetrical lens; the term is also used for lenses generally.

In common usage, the term "lens" is also used to describe the shape of a three-dimensional object obtained by rotating a two-dimensional lens about its narrow axis of symmetry. Such a shape is described as "lenticular".

ee also

*Mrs. Miniver's problem

References

* cite web|accessmonthday=June 13 |accessyear=2005
url=http://mathworld.wolfram.com/Lens.html
title=Lens
author=Eric W. Weisstein.
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