Here's why:
* Longitudinal waves involve oscillations that are parallel to the direction of wave propagation. Think of a spring: when you push one end, the compression (or rarefaction) travels along the spring in the same direction as the initial push.
* Transverse waves involve oscillations that are perpendicular to the direction of wave propagation. Think of a rope: when you shake one end up and down, the wave travels along the rope, but the rope itself moves up and down.
Examples of longitudinal waves:
* Sound waves: Sound travels through air, water, or solids as a series of compressions and rarefactions.
* Seismic P-waves: These waves travel through the Earth's interior as compressions and rarefactions.
Let me know if you'd like more information about waves!
