O-LevelPhysicsLightOct/Nov 2023Paper 1 Q401 Mark

When observed on the Earth, the redshift of the light from galaxy X is smaller than the redshift of the light from galaxy Y. Which galaxy is closer to the Earth and which galaxy is receding from the Earth faster?

Q: What topic does this question test?

This question tests Light in O-Level Physics (syllabus code 5054). It is worth 1 mark.

AX X

BX Y

CY X

DY Y

✓ Correct Answer

The correct answer is B: X Y

📋 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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About This O-Level Physics Question

Topic

This multiple-choice question tests Light in O-Level Physics (syllabus code 5054). It is worth 1 mark.

Source

This question appeared in the Cambridge O-Level Physics Oct/Nov 2023 examination, Paper 1 Variant 2.

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