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In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. The traditional geometrical shape is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type.

Usage

See Special:Whatlinkshere/Etymology:Prism for a list of articles using this term.

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This is an etymology page: a page detailing the origins of terminology used in the series in regards to real world culture and history.
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