Refraction of light — Difficult
Transfer your understanding to a changed context, justify decisions and check your reasoning. No hints during the test.
Includes extension practice
Qualitative refraction and ray angles are included. Refractive-index calculations, Snell’s law, critical angles and total internal reflection extend this course.
Easy, Normal and Difficult describe practice demand; they are not the official Core and Extended tiers.
- Cambridge IGCSE Combined Science 0653 syllabus 2028–2029 · P3.2.2, p52
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