CAIE IGCSE Physics: Real Image Ray Diagrams Question Bank
Practise constructing converging lens ray diagrams to locate real images and connect ray paths with image position and orientation.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Practise constructing converging lens ray diagrams to locate real images and connect ray paths with image position and orientation.
Fig. 6.1 is a full-size diagram of a lens and an image I of an object.

Fig. 6.1
The focal length of the lens is 3.0 cm .
On Fig. 6.1, draw two rays from the image I to locate the object. Draw the object and label it O.
method 1
two correct rays from:
- ray from top of I through the centre of the lens
- ray from top of I parallel to principal axis to the left of the lens, to centre of lens and then through RH focus
- ray from top of I through LH focus to lens, to centre of lens and then parallel to principal axis on the right of the lens
M2
OR
method 2
two correct rays from:
- ray from top of I through the centre of the lens
- ray from top of I through RH focus of lens and extended back, from centre of lens, parallel to principal axis on the left of the lens
- ray from top of I parallel to principal axis to the left of the lens, and extended back, from the centre of the lens, through the LH focus
M2
object, labelled O , at the intersection of rays to the RH of the lens for method 1
object, labelled O , at the intersection of rays to the LH of the lens for method 2
A1