A-LevelPhysicsSuperposition9702/12 · Oct/Nov 2023 · Q281 Mark

Coherent light of constant wavelength is incident normally on a double slit. Interference fringes are formed on a screen that is a fixed distance from the double slit. The screen is parallel to the double slit. The separation of the slits is varied. Which graph best shows the variation with slit separation a of the spacing x of the interference fringes?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

A[Diagram option A]

B[Diagram option B]

C[Diagram option C]

D[Diagram option D]

✓ Correct answer

A: [Diagram option A]

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2023 Paper 1 Variant 2, question 28.

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