O-LevelPhysicsLightOct/Nov 2025Paper 1 Q311 Mark
A student does an investigation using four thin lenses. The lenses are used to produce focused images of four different objects. The student measures the length of the image and the length of the object. The results are shown in the table. In which case is the magnification produced the greatest? [Table 31.1]
Aimage length/cm: 3.5, object length/cm: 0.80
Bimage length/cm: 4.7, object length/cm: 0.60
Cimage length/cm: 4.8, object length/cm: 0.70
Dimage length/cm: 5.2, object length/cm: 0.90
✓ Correct Answer
The correct answer is B: image length/cm: 4.7, object length/cm: 0.60
📋 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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