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Waves are disturbances that propagate through space and time. Classically, they travelled through a medium, disturbing the particles but not changing their mean position. Electromagnetic waves/particle-waves need no medium; they are disturbances in their respective fields.

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Is this a complete list of phenomena that sound wave would encounter during travelling?

per wiki, Acoustic absorption refers to the process by which a material, structure, or object takes in sound energy when sound waves are encountered, as opposed to reflecting the energy. …
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are there any other distinguishing characteristics for waves? [closed]

This post distinguish Waves as 2 styles: Longitudinal versus Transverse Waves versus Surface Waves Electromagnetic versus Mechanical Waves are there any other distinguishing characteristics? …
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