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AP EAMCET201822 Apr 2018Morning ShiftPhysicsWaves and SoundActual

A reflector is moving with 20 ~ms ⁻¹ towards a stationary source of sound. If the source is producing sound waves of 160 ~Hz , then the wavelength of the reflected wave is ( speed of sound in air is 340 ~ms ⁻¹ )

Options

  1. A17 8 ~m
  2. B17 11 ~m
  3. C17 9 ~m
  4. D17 16 m

Correct answer

C. 17 9 ~m

Step-by-step solution

Wavelength of the reflected wave is aligned ^ & = ( v-v_s v+v_s ) = ( v-v_s v+v_s ) v v & = 340-20 340+20 340 160 = 120 360 340 160 ^ & = 17 9 ~m aligned

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