The observed wavelength in front of a source moving at vs is:

  1. lambda' = vfs
  2. lambda' = v + vsfs
  3. lambda' = fsv - vs
  4. lambda' = v - vsfs
Answer

D) lambda' = v - vsfs

Each wavefront is emitted vs/fs closer. SLO P-11-D-03 · Application

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