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JAMB Physics 1981 Question 8

Question 8

Sound

If a source of sound is moving, a stationary listener will hear a sound of different frequency. This is called

  1. A.Doppler effect
  2. B.resonance
  3. C.ultra sound
  4. D.diffraction of sound
  5. E.rarefaction.
Show the answer and explanation

Answer: A (Doppler effect)

Explanation

The change in heard frequency caused by relative motion of source and listener is the Doppler effect.