Unit 9 Part 2

In the second part of unit 9, we learned more about waves. We learned things such as the difference between reflection and refraction, dispersion, natural frequency, resonance, the speed of sound, superimposition, and much more. Reflection is when a wave basically goes back in the opposite direction it came from where as refraction is when the wave bends. Natural frequency is "the frequency and object wants to vibrate at" and when something resonates with it, it has the same frequency and increases amplitude. Sound is a longitudinal and that the speed of sound is around 345 m/s depending on the air.