angle of incidence

an·gle of in·ci·dence

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

an·gle of in·ci·dence

(anggĕl insi-dĕns)

1. Angle that a ray entering a refracting medium makes with a line drawn perpendicular to the surface of this medium;

2. Angle that a ray striking a reflecting surface makes with a line perpendicular to this surface.
Synonym(s): incident angle.