A-LevelPhysicsWavesMay/June 2025Paper 1 Q271 Mark
Vertically polarised light of intensity I_0 is incident normally on a polarising filter. The transmission axis of the filter is at an angle θ to the plane of polarisation of the light. The intensity of the light after passing through the filter is I_0 / 3. [Diagram shows vertically polarised light of intensity I_0 incident on a filter. The filter's transmission axis is at angle θ to the vertical plane of polarisation. Light after filter has intensity I_0/3.] What is θ?
A8.4°
B55°
C71°
D84°
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of waves within the Physicssyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
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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