Definitions for "Angle of Reflection"
The angle between a ray which is reflected from a surface, and the normal to that surface.
The angle that radiation reflected from a surface makes with the perpendicular (normal) to the surface.
(Generally identified as , but sometimes as a "numbered" theta, such as 2.) The angle at which light is reflected by an interface between two media, measured between the path of the light and the normal to the interface.(In the figure to the right, the angle of reflection lies between the normal and the red reflected light beam and is denoted by See this page of this module to learn more about reflection.