A-LevelPhysicsWavesFeb/Mar 2025Paper 1 Q261 Mark
A polarised beam of light with intensity I is incident normally on a polarising filter. The transmitted light has intensity I. The filter is rotated about the normal axis through an angle θ. The transmitted light has intensity 0.75I. What is the angle θ?
A30°
B42°
C49°
D60°
✓ Correct Answer
The correct answer is A. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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