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Physics (AS & A Level) · Feb / March 2019 · Paper 12 · Question 22

9702Transverse and longitudinal waves

A sound wave passes through air. The diagram shows the positions of the molecules of the air at one instant. Which distance is equal to the wavelength of the wave?

  1. APQ
  2. BPS
  3. CQR
  4. DQS

As printed in the paper

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Correct answer: D. QS

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