A-LevelPhysicsSuperposition9702/12 · May/June 2020 · Q241 Mark

The diagram shows an experiment to produce a stationary wave in an air column. A tuning fork, placed above the column, vibrates and produces a sound wave. The length of the air column can be varied by altering the volume of the water in the tube. [Figure 24.1] The tube is filled and then water is allowed to run out of it. The first two stationary waves occur when the air column lengths are 0.14 m and 0.42 m. What is the wavelength of the sound wave?

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A0.14 m

B0.28 m

C0.42 m

D0.56 m

✓ Correct answer

D: 0.56 m

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Topic: Superposition, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2020 Paper 1 Variant 2, question 24.

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