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KCET2012PhysicsWaves and Sound

Which of the following is incorrect?

Options

  1. A'Diffraction' helps us to distinguish between sound wave and light wave
  2. BIf the wave is longitudinal, it must be a mechanical wave
  3. CIf the wave is mechanical, it may or may not be a transverse wave
  4. DMechanical waves cannot propagate in vacuum

Correct answer

B. If the wave is longitudinal, it must be a mechanical wave

Step-by-step solution

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