A-LevelPhysicsSuperpositionOct/Nov 2013Paper 1 Q281 Mark
Light of wavelength λ passes through a diffraction grating with slit spacing d. A series of lines is observed on a screen. [Figure 28.1] What is the angle α between the two first order lines?
Asin⁻¹(λ / 2d)
Bsin⁻¹(λ / d)
C2 sin⁻¹(λ / 2d)
D2 sin⁻¹(λ / d)
✓ 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...
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