CAIE IGCSE Physics Reflection of Light Question Bank

Practise plane-mirror reflection through angle rules, ray construction, image properties and visibility problems involving observers, mirrors and objects.

Exam points

measure both angles from the normal and apply angle of incidence = angle of reflection
construct incident and reflected rays with arrows to connect an object, mirror and observer
locate the virtual image behind the mirror at the same perpendicular distance as the object

Covered syllabus points

3.2.1.1—Terms normal, angle of incidence and 3.2.1.2—Formation of an optical image by a 3.2.1.3—For reflection, the angle of incidence 3.2.1.4—Simple constructions, measurements and

[Maximum number: 1]

A ray of light is reflected by a plane mirror.

Figure for Question 3.2.1 Reflection of light question 1 — CAIE IGCSE Physics

Which row shows the angle of incidence and the angle of reflection?

angle of

incidence

angle of

reflection

[Maximum number: 4]

(a)

Fig. 7.1 shows a plan view of a room. There is a plane mirror on one wall and a picture across the whole of wall AB.

Fig. 7.1 (plan view)

A person is standing at point X and is looking at the mirror. The person cannot see all of the picture on wall AB reflected in the mirror.

There is a point P on wall AB which is the closest point to A that the person can see reflected in the mirror.

On Fig. 7.1, draw a reflected ray and an incident ray to show the position of the point P.

[ 2 ]

(b)

State two properties of the image formed by the mirror.
1.
2.

[ 2 ]

[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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Covered syllabus points

3.2.1 Reflection of light question 1

3.2.1 Reflection of light question 2

Question (a)

Question (b)

3.2.1 Reflection of light question 3