Cambridge IGCSE Physics · Syllabus 0625 · Waves
Law of reflection
What is Law of reflection?
The normal is the line drawn at right angles to a reflecting surface at the point where a ray strikes it; the angle of incidence is the angle between the incident ray and the normal, and the angle of reflection is the angle between the reflected ray and the normal. The law of reflection states that the angle of incidence equals the angle of reflection, and that the incident ray, the reflected ray and the normal all lie in the same plane.
This definition is part of the Waves chapter in Cambridge IGCSE Physics.