College Physics I – Introduction

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Longitudinal wave

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College Physics I – Introduction

Definition

A longitudinal wave is a type of wave where the particle displacement is parallel to the direction of wave propagation. Sound waves in air are a common example.

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5 Must Know Facts For Your Next Test

  1. In a longitudinal wave, compressions and rarefactions occur along the direction of wave propagation.
  2. Sound waves are the most common examples of longitudinal waves.
  3. The wavelength in a longitudinal wave is the distance between two consecutive compressions or rarefactions.
  4. Longitudinal waves can propagate through solids, liquids, and gases.
  5. The speed of a longitudinal wave depends on the medium's elasticity and density.

Review Questions

  • What is the main characteristic that differentiates a longitudinal wave from a transverse wave?
  • Name an everyday example of a longitudinal wave.
  • How do compressions and rarefactions relate to wavelength in a longitudinal wave?
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