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Refraction of light
Explain how light changes speed and direction between media, use refractive index, and describe total internal reflection, dispersion and lenses.
⏱ 20 min❓ 8 questions
What you'll be able to do
- ✔I can explain refraction as a change in the speed of light between media and predict which way a ray bends
- ✔I can calculate refractive index using n = c ÷ v
- ✔I can explain how convex and concave lenses, optical fibres and prisms use refraction
How this works
- 1Read the short explanations first — they teach you what you need before each question.
- 2Answer each question, then tap Check. A right answer moves you on automatically; if it's wrong, you'll see a friendly explanation of why.
- 3Finish all 3 steps to see your score — sign in and subscribe to unlock the full lesson and save it.
What's inside
8 questions and 1 quick teaching card, including:
- 🔘Multiple choice — Tap the answer you think is best, then check it.
- 🔢Number answer — Work out the answer and type the number.
👪Grown-up tip: sit alongside younger learners for the first few lessons. Read the questions together and chat about the explanations — that's where the real learning sticks.
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Curriculum: AC9S9U04