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NEET2003PhysicsWaves and SoundActual

An observer moves towards a stationary source of sound with a speed 1/5th of the speed of sound. The wavelength and frequency of the source emitted are and f respectively. The apparent frequency and wavelength recorded by the observer are respectively:

Options

  1. A1.2 f, 1.2
  2. B1.2 f,
  3. Cf, 1.2
  4. D0.8 f, 0.8

Correct answer

B. 1.2 f,

Step-by-step solution

Source is stationary aligned & = constants & and f^ = V+V_ s V f= (1+ V_ s V ) f & = (1+ 1 5 ) f=1.2 f aligned

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