CAIE IGCSE Physics 3.2.2.9 Use of optical fibres, particularly in
Practise explaining how optical fibres guide light and why total internal reflection supports telecommunications signals.
- Syllabus
- 2026–2028
- Course
- Physics 0625
Exam points
- explain signal transmission in an optical fibre using repeated total internal reflection
- link fibre use in telecommunications to guided light travelling along a narrow core
3.2.2.9—Use of optical fibres, particularly in question 1
Fig. 4.2 shows the same plastic as in (a) used to make an optical fibre. A ray of light is passing along the fibre.
Fig. 4.2
State two uses for optical fibres.
1
2
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