The angle of incidence of a ray of light on a plane mirror is gradually decreased until the light ray is incident perpendicular (normal) to the mirror surface.
To the nearest degree, what is the angle between the incident and reflected rays at this point?
0∘0^\circ0∘
45∘45^\circ45∘
90∘90^\circ90∘
180∘180^\circ180∘
48 exam-style questions on CIE IGCSE Physics 3.2.1a Reflection of light. Each one has a worked solution and a mark scheme showing where the marks go.