1. How do multiple waves interact with one another?

2. Reflection
Light waves scatter or bounce off of an object

3. Refraction
Light waves bend while going through an object

4. Diffraction
involves a change in direction of waves as they pass through an opening or around a barrier in their path

5. Constructive Interference
When two waves meet in such a way that their crests line up together, resulting wave has higher amplitude

6. Destructive Interference
the crest of one wave meets the trough of another, and the result is a lower total amplitude.

7. Absorption
Light waves are absorbed by an object

8. Pitch
A high pitch sound corresponds to a high frequency sound wave and a low pitch sound corresponds to a low frequency sound wave.