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IAT IISER2023PhysicsWaves and Sound

The frequency of the whistle of a train moving with a constant speed is observed by a stationary detector on the platform to be ₁ . The frequency of the same whistle is detected to be ₂ inside another train moving on a parallel track, at a speed v towards the first train. If the speed of sound in air is taken to be v_ sound , what is the ratio v / v_ sound ?

Options

  1. A₂- ₁ ₁
  2. B₂ ₁
  3. C₂- ₁ ₂
  4. D₁ ₂

Correct answer

A. ₂- ₁ ₁

Step-by-step solution

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