A-LevelPhysicsSuperpositionOct/Nov 2020Paper 1 Q291 Mark
An experiment is carried out to demonstrate double-slit interference using light of wavelength 500 nm. The distance between bright fringes in the interference pattern is 5 mm. What are possible values for the distance between the slits and the screen, and the slit separation?
Aslit-screen distance: 50 cm, slit separation: 0.5 mm
Bslit-screen distance: 50 cm, slit separation: 5 mm
Cslit-screen distance: 5 m, slit separation: 0.5 mm
Dslit-screen distance: 5 m, slit separation: 5 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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