A-LevelPhysicsSuperposition9702/12 · Oct/Nov 2016 · Q281 Mark

Monochromatic light of wavelength 450 nm passes through two parallel slits 0.30 mm apart. Bright fringes are observed on a screen 2.0 m away. [Figure 28.1] How far apart are the bright fringes on the screen?

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A1.3 mm

B1.5 mm

C3.0 mm

D6.0 mm

✓ Correct answer

C: 3.0 mm

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Oct/Nov 2016 Paper 1 Variant 2, question 28.

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