IGCSE Physics · 3.2 Light
Total internal reflection for IGCSE Physics
Total internal reflection is mapped to 3.2 Light in the Cambridge IGCSE Physics pathway. Use this public guide to see exactly where the concept fits, what to master, and which GioPhysics resource continues the study sequence.
Where this fits
3.2 Light
- Curriculum
- Cambridge IGCSE Physics
- Theme or group
- Waves
- Current framework
- Examinations in 2026–2028 · Version 2 (December 2025)
Reflection, refraction, total internal reflection, and dispersion are in Chapter 25; lenses continue in Chapter 26.
Mastery checklist
Know what success looks like.
- 01
Label the wave or ray diagram with the quantities and boundary conditions that matter.
- 02
Relate frequency, period, wavelength, speed, phase, or angle using the correct model.
- 03
Predict how the observable pattern changes when one controlled variable changes.
Exam lens
Build, apply, check.
3.2 Light sits inside Waves. Build the concept first, then practise selecting a model, showing working, and checking the final result.
Teaching sequence
3.2 Light
This syllabus point maps to 5 ordered concept guides.
- 01Reflection and ray diagrams
- 02Refraction and Snell's law
- 03Total internal reflectionCurrent guide
- 04Colour and dispersion
- 05Thin converging lenses