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Question

Why is sound not a transverse wave?


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Solution

Step 1: Definitions

Transverse Waves: Transverse waves are those waves in which the particles of the medium move perpendicular to the direction of the propagation of the wave. For example, waves in water are the example of transverse waves.

Longitudinal Waves: Longitudinal waves are those waves in which the particles of the medium move parallel to the wave propagation. For example, sound waves are longitudinal waves.

Step 2: Explanation: Why sound waves are not transverse waves:

  1. Sound propagates through the medium as a series of compression and rarefaction.
  2. When the vibrating object moves forward it pushes and compresses the air in front of it and creates a high-pressure region (compression).
  3. When the vibrating object moves backward it creates a low-pressure region (rarefaction).

Here, particles of the medium move in the direction parallel to the direction of wave propagation.

Thus, sound waves are called longitudinal waves, not transverse waves.


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