Case study·Standard multi-step (3/5)·No calculator
Difficulty guide
The label describes the problem, not your ability.
1/5 - Foundational
Warm-up setup; checks one basic idea.
2/5 - Routine exam skill
Normal syllabus skill; usually one main rule or interpretation.
3/5 - Standard multi-step
Exam-style problem with multiple steps or a common trap.
4/5 - Hard exam skill
High-end exam problem; combines methods carefully.
5/5 - Challenge
Stretch problem beyond normal exam pressure.
Question
The figure shows ray paths traced through a rectangular glass slab and a triangular prism.
Total: 4 marks
(a) For the glass slab, state the relation between incident and emergent rays. (1 mark)
(b) Name the sideways shift in the glass slab path. (1 mark)
(c) For the prism, name the angle between incident ray produced and emergent ray. (1 mark)
(d) Why should pins be placed well apart while tracing? (1 mark)
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