CAIE IGCSE Physics 3.2.1.3 For reflection, the angle of incidence

Practise applying the law of reflection to mirror diagrams, angle calculations, ray directions and reflected light paths.

Exam points

calculate the reflection angle from an incidence angle, or from an angle to the mirror surface
interpret r against i graphs as equal angles for reflection from a plane mirror
choose a mirror position that sends an incident ray towards a named observer or point

[Maximum number: 1]

The angle of incidence of a ray of light incident on a plane mirror is gradually increased.
To the nearest degree, what is the maximum possible angle between the incident and reflected rays?

$0^{\circ}$

$45^{\circ}$

$90^{\circ}$

$180^{\circ}$

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3.2.1.3—For reflection, the angle of incidence question 1