Date: 1626
: the angle that a line (as a ray of light) falling on a surface or interface makes with the normal drawn at the point of incidence
Date: 1626
: the angle that a line (as a ray of light) falling on a surface or interface makes with the normal drawn at the point of incidence
Merriam-Webster's Collegiate English vocabulary. Энциклопедический словарь английского языка Merriam Webster. 2003