angle-deviation

angle of deviation

noun Optics.
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.
Also called deviation.


Origin:
1825–35

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angle of deviation
 
n
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

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