Nicol prism

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Nicol prism

(ˈnɪkəl)
n
(General Physics) (also without capital) a device composed of two prisms of Iceland spar or calcite cut at specified angles and cemented together with Canada balsam. It is used for producing plane-polarized light
[C19: named after William Nicol (?1768–1851), Scottish physicist, its inventor]
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Noun1.Nicol prism - optical device that produces plane-polarized light
optical device - a device for producing or controlling light
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The book draws on personal papers, journals, and correspondence to recreate the social and intellectual worlds of six idealists: Helena Born, Miriam Daniell, Robert Allan Nicol, William Baillie, Gertrude Dix, and Helen Tufts.