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 Description  
 Prism:  A polyhedron with two parallel and congruent faces, called bases, and all other faces that are parallelograms.

 

This is a triangular prism. The triangular part refers to the two triangles which are in parallel planes. The triangles are the bases of the prism.

 

 

 

Translucent prisms refract ordinary white light into the color spectrum. In the diagram below, white light is directed toward the prism on the left. As the light passes through the prism it is separated into the seven colors of visible light: Red, Orange, Yellow, Green, Blue, Indigo, Violet (like a rainbow!). This can be remembered with the acronym: ROY-G-BIV.

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