A-LevelPhysicsSuperpositionMay/June 2014Paper 1 Q261 Mark
Light passes through a diffraction grating ruled at 1000 lines per cm and the same wavelength of light also passes through two narrow slits 0.5 mm apart. Both situations produce intensity maxima and minima on a screen. Which statement about the separation of the maxima on the screen and the sharpness of the maxima is correct?
AThe diffraction grating maxima are less widely spaced and are less sharp than the two-slit maxima.
BThe diffraction grating maxima are less widely spaced and are sharper than the two-slit maxima.
CThe diffraction grating maxima are more widely spaced and are less sharp than the two-slit maxima.
DThe diffraction grating maxima are more widely spaced and are sharper than the two-slit maxima.
✓ 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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