Im slightly confused.. What waves do sound actually travel in?
In the first chapter of my physics book it mentions both.
Tranverse waves, where particles of a medium vibrate perpendicular to the wave propagation,
Longitudinal Waves, where particles vibrate parallel to the direction of wave propagation..
However it doesnt say why we need to both..
If a particle 'P' were suspended in air, and a speaker makes to the right of it. Would 'P' be moving left/right (longitudinal) or up/down (transverse)