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JEE Main2002PhysicsWaves and SoundActual

A wave y=a ( t-k x) on a string meets with another wave producing a node at x=0 . Then the equation of the unknown wave is

Options

  1. Ay=a ( t+k x)
  2. By=-a ( t+k x)
  3. Cy = a ( t - kx )
  4. Dy =- a ( t - kx )

Correct answer

B. y=-a ( t+k x)

Step-by-step solution

y₁+y₂=a ( t-k x)-a ( t+k x)=-2 a t k x y₁+y₂=0 at x=0

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