A-LevelPhysicsSuperpositionMay/June 2013Paper 1 Q281 Mark
A teacher sets up the apparatus shown to demonstrate a two-slit interference pattern on the screen. [Figure showing a double-slit experiment setup with source, single slit, double slit, and screen, with distances p, q, r labeled] Which change to the apparatus will increase the fringe spacing?
Adecreasing the distance p
Bdecreasing the distance q
Cdecreasing the distance r
Ddecreasing the wavelength of the light
✓ Correct Answer
The correct answer is B. 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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