| A | B |
|---|
| compression | more dense region of longitudinal wave |
| rarefaction | less-dense region of longitudinal wave |
| wavelangth | distance between one point on a wave and next same point |
| frequency | number of wavelengths that pass a fixed point per second |
| period | amount of time for one wave to pass fixed point |
| amplitude | measure of size of disturbance from wave |
| refraction | bending of wave caused change in speed and medium |
| perpendicular | line that forms 90 degree angle with another line |
| diffraction | bending of wave around an object |
| interference | process of two or more waves overlapping and combining for new wave |
| standing wave | special wave pattern; same wave length & amplitude, travel opposite direction, interfere with each other |
| node | standing wave location where interfereing waves cancel |
| resonance | object vibrate by absorbing energy at natural frequency |
