A-LevelPhysicsSuperpositionMay/June 2025Paper 1 Q311 Mark
Light of a single wavelength is incident normally on a double slit. Interference fringes are observed on a screen. The distance from the double slit to the screen is 0.60 m and the fringe separation is 1.8 mm. The distance from the double slit to the screen increases by 0.90 m. What is the new fringe separation?
A1.2 mm
B2.7 mm
C4.5 mm
D5.4 mm
✓ Correct Answer
The correct answer is C. This question tests the candidate's understanding of superposition within the Physicssyllabus. The examiner's mark scheme requires...
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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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