A-LevelPhysicsSuperpositionFeb/Mar 2018Paper 1 Q261 Mark
In a double-slit interference experiment, light of frequency 6.0 × 10¹⁴ Hz is incident on a pair of slits. Bright fringes that are 3.0 mm apart are observed on a screen some distance away. What is the separation of the bright fringes when the frequency of the light is changed to 5.0 × 10¹⁴ Hz?
A1.8 mm
B2.5 mm
C3.0 mm
D3.6 mm
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The correct answer is D. 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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