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Case study·Standard multi-step (3/5)·Calculator allowed

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

A prism has angle A=60∘A=60^\circ. The graph shows its angle of deviation DD as the incidence angle ii is varied.
Total: 5 marks

(a) Read the minimum deviation from the graph. (1 mark)

(b) Find the refractive index of the prism material. (3 marks)

(c) State the relation between incidence and emergence angles at this point. (1 mark)

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cbse-physics-12.u6.t6-3.case.001

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