* Compression Waves: These waves are characterized by compressions (areas of high density) and rarefactions (areas of low density) that travel through a medium.
* Particle Movement: The particles in the medium oscillate back and forth around their equilibrium position.
* During a compression, particles are pushed closer together.
* During a rarefaction, particles are pulled farther apart.
Think of it like this:
Imagine a slinky. If you push one end of the slinky, you create a compression wave that travels down the slinky. The individual coils of the slinky (representing particles) don't move all the way down the slinky; they just oscillate back and forth.
Key Points:
* Direction of wave travel: The compression wave moves forward, carrying energy.
* Direction of particle movement: Particles oscillate back and forth *parallel* to the direction of wave travel.
Examples:
* Sound waves: Sound waves are compression waves that travel through air, water, or solids. The molecules of these mediums oscillate back and forth, creating the compressions and rarefactions we perceive as sound.
* Seismic waves: Earthquakes generate compression waves (P-waves) that travel through the Earth's interior.
Let me know if you have any other questions!
