- Normal: The normal is an imaginary line that is perpendicular to a surface at the point of incidence, used as a reference for measuring angles of incidence and reflection.
- Angle of Incidence: The angle of incidence is the angle formed between the incident ray (incoming light) and the normal at the point where the ray strikes a surface.
- Angle of Reflection: The angle of reflection is the angle formed between the reflected ray (outgoing light) and the normal at the point of reflection, which is equal to the angle of incidence according to the law of reflection.
distinguish the terms normal, angle of incidence, and angle of reflection. one sentence for each
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