REFLECTION OF LIGHT

=The ray of light which strikes the surface is called the incident ray.

=The ray of light which leaves the surface is called the reflected ray.

=A line perpendicular to the surface is imagined at the point of reflection. This line is called a normal. In this ontext the word normal means perpendicular.

=The angle between the incident ray and the normal is called the angle of incidence, or the incident angle.

=The angle between the reflected ray and the normal is called the angle of reflection, or the reflected angle.

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