WJEC A Level Physics
WJEC A Level Physics 2.6 Refraction of Light Exam Questions
Free WJEC A Level Physics exam questions on 2.6 Refraction of Light, with mark schemes. Covers refractive index, Snell's law, total internal reflection and optical fibres.
2.6 Refraction of Light exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
StemUp mark scheme flashcards
A Level Physics Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
View flashcards
About WJEC A Level Physics 2.6 Refraction of Light
This topic covers how light bends.
What you need to know
- Refractive index n = c/v.
- Snell's law n₁ sin θ₁ = n₂ sin θ₂.
- Critical angle sin c = n₂/n₁; total internal reflection.
- Optical fibres Multimode dispersion and cladding.
Common mistakes in 2.6 Refraction of Light
- Measuring angles from the surface.
- Thinking TIR occurs going into a denser medium.
- Ignoring cladding.
Try three 2.6 Refraction of Light exam-style questions
1. Find the critical angle for glass of n = 1.50 in air. (1 mark)
Show the mark scheme answer
41.8°.
2. Explain why fibres have cladding. (2 marks)
Show the mark scheme answer
Protects the core (1) and reduces multimode dispersion and signal leakage (1).
3. Light enters glass (n = 1.5) at 40°. Find the angle of refraction. (1 mark)
Show the mark scheme answer
25.4°.
2.6 Refraction of Light FAQs
What does Refraction of Light cover?
Snell's law, critical angle and optical fibres.
Which practical links here?
Measuring refractive index of a glass block.
What is multimode dispersion?
Rays take different paths and arrive at different times, smearing pulses.
Revise this topic with flashcards: A Level Physics Flashcards, with mark scheme answers for Anki and Quizlet.
