optics (op´tiks)
The science concerned with the properties of light, its refraction and absorption, and the refracting media of the eye in that relation. [G. optikos, fr. ops, eye]
Nomarski o. an optical system for differential interference contrast microscopy.
schlieren o. an optical system, often used in diffusion and centrifugation studies, which observes the refractive index gradient in solutions containing macromolecules.
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