A-LevelPhysicsSuperpositionMay/June 2023Paper 1 Q281 Mark
The diagram shows a view from above of a double-slit interference demonstration. L is a monochromatic light source with a vertical filament. B is a barrier with two narrow vertical slits and S is a screen upon which interference fringes form. [Figure 28.1] The intensity is I at the point on the screen where the centre of the fringe pattern forms. When one of the slits is covered, what is the intensity at the same point on the screen?
AI/√2
BI/2
CI/(2√2)
DI/4
✓ Correct Answer
The correct answer is D. This question tests the candidate's understanding of superposition 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...
🔒
Unlock the Examiner's Answer
Sign up for free to reveal the correct answer, the official mark scheme breakdown, and the examiner trap analysis for this question.
Sign Up Free to Unlock →Join thousands of Cambridge students already using Oracle Prep