Question

define angle of incidence and angle of refraction.​

Answer 1

Explanation:

$\huge\bf\red{Angle\: of\:incidence}$

The angle between the direction of motion of the oncoming wave and a perpendicular to the reflecting surface (angle of incidence) is equal to the angle between the direction of motion of the reflected wave and a perpendicular (angle of reflection).

$\huge\bf\red{Angle\: of\:refraction}$

the angle between a refracted ray and the normal drawn at the point of incidence to the interface at which refraction occurs.