Question

Why is sound wave called a longitudinal wave?​

Answer 1

Answer:

Waves in which particles of the medium move in a direction parallel to the direction of the wave or in the direction of energy transport are called longitudinal waves.The air particles vibrate parallel to the direction of propagation. Hence a sound wave is called a longitudinal wave.

Explanation:

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Answer 2

${\large{\boxed{\textsf{\textbf{✒~~~Reason :}}}}}$

The sound wave is called a longitudinal wave because it is produced by compressions and rarefactions in the air. The air particles vibrate parallel to the direction of propagation. In Sound waves, the amplitude of the wave is the difference between the maximum pressure caused by the wave and the pressure of the undisturbed air.