IB skill practice

Apply Doppler effect reasoning

Official-syllabus Physics skill catalogue entry. Seeded skills are activated only after exam-style question templates pass validation.

Paper 1, Paper 2 5 marks Difficulty 5

Approaching source Doppler frequency

A source in a school sound lab moves toward a stationary observer at \(10\,\text{m s}^{-1}\). The emitted frequency is \(520\,\text{Hz}\), and sound speed is \(340\,\text{m s}^{-1}\). Calculate the observed frequency. Enter the numerical result and choose the interpretation that matches the wave meaning.

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