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Question 31261
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Sound Waves: Doppler Formula MCQ

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Doppler FormulaEasyQuestion 31261

Question

Doppler effect formula for sound: observer moving toward stationary source gives observed frequency:
  1. A
    f₀(v−v₀)/v
  2. B
    f₀(v+v₀)/v
    Correct
  3. C
    f₀v/(v+v₀)
  4. D
    f₀v/(v−v₀)

Correct answer

f₀(v+v₀)/v

Explanation

Observer moving toward source: f_observed = f₀(v+v₀)/v. More wavefronts hit observer per second.

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