A planet orbiting a distant star can be detected by:

  1. sound waves from the planet
  2. the periodic Doppler shift ('wobble') of the star's light
  3. measuring the star's mass on a balance
  4. seeing the planet directly
Answer

B) the periodic Doppler shift ('wobble') of the star's light

Radial velocity method. SLO P-11-D-04 · Understanding

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