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Physics

Module 3: Waves and Thermodynamics

Displacement of Air Molecules as Variations in Pressure

How does sound travel through the air?

In this post, we relate the displacement of air molecules to variations in pressure, as a part of the Prelim Physics course under the module Waves and Thermodynamics and sub-part Sound Waves.

The following video visualises the displacement of air molecules as variations in pressure, demonstrating the sinusoidal nature of the longitudinal wave of sound as it travels through the air.