- Lens (geometry)
In
geometry , a lens is aconvex 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. TheVesica 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
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Mrs. Miniver's problem References
* cite web|accessmonthday=June 13 |accessyear=2005
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title=Lens
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