A-LevelPhysicsWaves9702/12 · May/June 2015 · Q281 Mark
A pattern of waves was observed without being able to view the source of the waves. The pattern is represented in the diagram. [Figure showing a series of curved wavefronts, some dashed ("region of minimum intensity") and some solid ("region of maximum intensity"), indicative of an interference pattern.]
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.
Acoherence only
Bdiffraction and interference
Cdiffraction only
Dinterference only
✓ Correct answer
B: diffraction and interference
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