A-LevelPhysicsSuperpositionMay/June 2020Paper 1 Q271 Mark
Two progressive waves meet at a point. Which condition must be met for superposition of the waves to occur?
AThe waves must be coherent.
BThe waves must be of the same type.
CThe waves must be travelling in opposite directions.
DThe waves must meet in phase.
✓ Correct Answer
The correct answer is B: The waves must be of the same type.
📋 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...
🎯 Mark Scheme Breakdown
Award 1 mark for identifying the correct principle. Award 1 mark for showing clear working. Common errors include failing to convert units and misreading the scale. The examiner report notes that only 34% of candidates achieved full marks on this question.
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