O-LevelPhysicsLightOct/Nov 2025Paper 1 Q211 Mark
An object O is placed near to a thin converging lens. The diagram shows three rays of light from the object passing through the lens. Which row describes the image formed and gives the position of a principal focus (focal point) of the lens?
Aimage formed
real
position of principal focus
R
Bimage formed
real
position of principal focus
Q
Cimage formed
virtual
position of principal focus
P
Dimage formed
virtual
position of principal focus
S
✓ Correct Answer
The correct answer is A: image formed real position of principal focus R
📋 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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