Part of speech: noun

The change of direction of a ray, as of light or heat.

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Usage examples "refraction":

  1. In reality the line in question is not exactly straight, for, from the effect of refraction, we actually see the sun for a short interval during which the opaque mass of the earth is interposed in a direct line between the sun and our eyes; thus realizing, though but to a limited extent, the coveted desideratum of seeing round a corner. - "A System Of Logic, Ratiocinative And Inductive (Vol. 1 of 2)", John Stuart Mill.
  2. Halos of this nature are supposed to arise from the double refraction of the rays from the sun as the light passes through thin clouds, or from the transmission of light through particles of ice. - "A Cotswold Village", J. Arthur Gibbs.
  3. Refraction frequently causes grotesque as well as wonderful and beautiful appearances. - "The Ocean and its Wonders", R.M. Ballantyne.