Refraction (2)
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4-1-880
Change in the direction of propagation of a radiation, determined by the change in the velocity of propagation in passing through a non-homogeneous medium, or in passing from one medium to another.
Reference: C.I.E. (modified)
Note: This phenomenon appears only when the angle of incidence is different from 90 degrees .
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)