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BITSAT2012PhysicsWaves and SoundActual

A sound souorce is moving towards stationary listener with 1 10 th of the speed of sound. The ratio of apparent to read frequency is

Options

  1. A( 9 10 )²
  2. B( 10 9 )
  3. C( 11 10 )
  4. D( 11 10 )²

Correct answer

B. ( 10 9 )

Step-by-step solution

v_ s = v 10 n ^ = n v v - v _ s n ^ n = v ( v - v 10 ) = 10 9

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