Nicol prism

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Ni·col prism

(nik'ŏl),
a prism that transmits only polarized light.

Nicol prism

A prism made by splitting a prism of Icelandic spar and rejoining the cut surfaces. This causes the light passing through to be split. Ordinary light rays are reflected by the joined surfaces, and polarized light is transmitted.
See also: prism

Nicol,

William, Scottish physicist, 1768-1851.
Nicol prism - transmits only polarized light.