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en.wikipedia.org/wiki/Cone_cell

Cone cells, or cones, are one of three types of photoreceptor cells in the retina of mammalian eyes (e.g. the human eye). They are responsible for color vision ...

hyperphysics.phy-astr.gsu.edu/hbase/vision/rodcone.html

The retina contains two types of photoreceptors, rods and cones. The rods are more numerous, some 120 million, and are more sensitive than the cones.

en.wikipedia.org/wiki/Cone

A cone is a three-dimensional geometric shape that tapers smoothly from a flat base to a point called the apex or vertex. A cone is formed by a set of line ...

www.dictionary.com/browse/cones

Cones definition, a solid whose surface is generated by a line passing through a fixed point and a fixed plane curve not containing the point, consisting of two ...

www.dictionary.com/browse/cone

Cone definition, a solid whose surface is generated by a line passing through a fixed point and a fixed plane curve not containing the point, consisting of two ...

www.khanacademy.org/math/basic-geo/basic-geo-volume-sa/volume-cones/v/volume-cone-example

The formula for the volume of a cone is V=1/3hπr². Learn how to use this formula to solve an example problem.

mathworld.wolfram.com/Cone.html

In general, a cone is a pyramid with a circular cross section. A right cone is a cone with its vertex above the center of its base. However, when used without ...

www.mathsisfun.com/geometry/cone.html

Cone. Go to Surface Area or Volume. Cone Facts. Notice these interesting things: cone shiny. It has a flat base; It has one curved side; It is not a polyhedron as it ...