A-LevelPhysicsWavesFeb/Mar 2024Paper 1 Q281 Mark
A beam of light with power P has an area of cross-section A. The amplitude of the light waves in the beam is X. The beam of light is then changed to one with the same frequency but with an increased amplitude of 4X and an area of cross-section reduced to A/3. What is the power of the new beam?
A1.3P
B5.3P
C12P
D48P
✓ 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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