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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

Further information

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.