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In optics, the lag distance of two refracted rays when they emerge from a crystal. The retardation is due to the refractive index of the crystal and its thickness.

Synonyms and Related Terms

retard (Fr.); Verlangsamung (Deut.)

Sources Checked for Data in Record

  • Walter C. McCrone, John Gustave Delly, The Particle Atlas, W. McCrone Associates, Chicago, IV, 1972

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