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O-LevelPhysicsLight5054/12 · Oct/Nov 2024 · Q221 Mark

The diagram shows a ray of light travelling from air to medium Q. [Figure] What is the critical angle for the boundary between medium Q and air?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A57.5°

B58.0°

C60.9°

D61.6°

✓ Correct answer

C: 60.9°

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About this question

Topic: Light, O-Level Physics (syllabus 5054). Multiple choice, 1 mark.
Source: O-Level Physics, Oct/Nov 2024 Paper 1 Variant 2, question 22.

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