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BITSAT2013PhysicsWaves and SoundActual

Two waves of wavelengths 99 ~cm and 100 ~cm both travelling with velocity 396 ~m / s are made to interfere. The number of beats produced by them per second is

Options

  1. A1
  2. B2
  3. C4
  4. D8

Correct answer

C. 4

Step-by-step solution

Velocity of wave v = n where n= frequency of wave n= v n ₂= v ₂ ₂ = 396 100 10⁻² =396 ~Hz no. of beats = n ₁- n ₂=4

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