A-LevelPhysicsSuperposition9702/12 · Feb/Mar 2016 · Q241 Mark

The diagram represents the pattern of stationary waves formed by the superposition of sound waves from a loudspeaker and their reflection from a metal sheet (not shown). [Figure 24.1] W, X, Y and Z are four points on the line through the centre of these waves. Which statement about these stationary waves is correct?

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.

AAn antinode is formed at the surface of the metal sheet.

Bnode is a quarter of a wavelength from an adjacent antinode.

CThe oscillations at X are in phase with those at Y.

DThe air particles oscillate perpendicular to the line WZ.

✓ Correct answer

B: node is a quarter of a wavelength from an adjacent antinode.

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, Feb/Mar 2016 Paper 1 Variant 2, question 24.

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