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angle of deviation

noun

, Optics.
  1. the angle equal to the difference between the angle of incidence and the angle of refraction of a ray of light passing through the surface between one medium and another of different refractive index.


angle of deviation

noun

  1. the angle between the direction of the refracted ray and the direction of the incident ray when a ray of light passes from one medium to another
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of angle of deviation1

First recorded in 1825–35

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angle of depressionangle of dip