A train sounding its horn passes you at constant speed. The pitch you hear:

  1. stays the same
  2. drops suddenly as it passes
  3. rises as it passes
  4. goes silent
Answer

B) drops suddenly as it passes

High while approaching, low while receding. SLO P-11-D-02 · Understanding

Physics MCQ · More Wave Intensity and the Doppler Effect MCQs · Practise