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Physics (AS & A Level) · May / June 2022 · Paper 13 · Question 23

9702Progressive waves

A cathode-ray oscilloscope (CRO) is connected to a microphone which detects sound of constant frequency. The trace on the screen of the CRO is shown. Which property of the sound wave is measured using only information from the CRO?

  1. Aamplitude
  2. Bperiod
  3. Cspeed
  4. Dwavelength

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Correct answer: B. period

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