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Medical Term:

angle of incidence



  1. the angle that a ray entering a refracting medium makes with a line drawn perpendicular to the surface of this medium;
  2. the angle that a ray striking a reflecting surface makes with a line perpendicular to this surface.

Synonym(s): incident angle

© Copyright 2017 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.