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Answer:
A ray that strikes the surface separating the two optical media is called the incident ray. The angle which the incident ray makes with the normal at the point of incidence is called the angle of incidence The angle which the reflected ray makes with the normal at the point of incidence is called the angle of reflecion.
reflected ray--The ray of light or other form of radiant energy which is thrown back from a opaque (nonpermeable or nonabsorbing) surface.
When a line is drawn perpendicular to the reflecting surface at the point of incidence, this line is known as normal. It is the imaginary line which is perpendicular to the reflecting surface. The normal ray is incident at 90 degrees to the reflecting surface.
the angle of incidence is the angle between a ray incident on a surface and, the normal.
the angle between a reflected ray and the normal drawn at the point of incidence to a reflecting surface is the angle of reflection.