Cambridge IGCSE Physics practice

Paper 4 structured question: Thin lenses

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Paper

Marks

Topic

Thin lenses

Exam-style question

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Paper 4Theory (Extended)2 marks

Ray diagrams are used to illustrate how lenses form images.

Diagram Description

Draw a ray diagram to show how a converging lens forms a virtual image when the object is placed within the focal length.

a
State the characteristics of the virtual image formed by a converging lens when the object is within the focal length.
Your answer
Aim for approximately 2 distinct marking points.
[2]

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Paper 4Theory (Extended)3 marks

Description

Explain how a converging lens can form a virtual image and illustrate this with a ray diagram.

a
State the position of the object relative to the focal point for a virtual image to be formed.
Your answer
Aim for approximately 1 distinct marking point.
[1]
b
State two characteristics of the virtual image formed by a converging lens.
Your answer
Aim for approximately 2 distinct marking points.
[2]