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Which among the following is true for propagation of sound waves?

Options

  1. ASound can travel in vacuum and it is a transverse wave in air.
  2. BSound cannot travel in vacuum and it is a longitudinal wave in air.
  3. CSound can travel in vacuum and it is a longitudinal wave in air.
  4. DSound cannot travel in vacuum and it is a transverse wave in air.

Correct answer

B. Sound cannot travel in vacuum and it is a longitudinal wave in air.

Step-by-step solution

Sound waves are longitudinal in nature and longitudinal waves require a medium to travel through. Hence Sound waves cannot travel in a vacuum. However transverse waves can travel in a vacuum.

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