A-LevelPhysicsSuperposition9702/12 · May/June 2024 · Q281 Mark

Interference fringes of separation x are observed on a screen at a distance of 1.00 m from a double slit that is illuminated by yellow light of wavelength 600 nm. At which distance from the double slit would interference fringes of the same separation x be observed when using blue light of wavelength 400 nm?

A0.33 m

B0.67 m

C0.75 m

D1.50 m

✓ Correct answer

D: 1.50 m

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2024 Paper 1 Variant 2, question 28.

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