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Definition of Quarter-wave plate
1. Noun. (physics) a sheet of birefringent material whose thickness is such that the light associated with the larger refractive index is retarded in phase by 90° with respect of that associated with the smaller refractive index; used to convert linearly polarized light into circularly polarized light ¹
¹ Source: wiktionary.com
Medical Definition of Quarter-wave plate
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