| A | B |
|---|
| standing waves | vibrations of violin |
| refraction | bending of a wavefront |
| period | the time it takes to complete a cycle |
| frequency | the number of cycles of vibrations in a amount of time |
| compression | the density and pressure are at a maximum |
| mechanical wave | a wave that requires a medium trough to travel |
| pitch | a measure of how high or low a sound is |
| node | where a standing wave maintains zero displacement |
| diffraction | a direction change when a wave encounters an obstacle |
| reflection | the turning back of an electromagnetic wave at a surface |
| crest | the hight point above the equilibrium position |
| trough | the lowest point below the equilibrium position |
| wavelength | the distance between two adjacent similar points of a wave |
| amplitude | the maximum displacement from equilibrium |
| longitudinal wave | a wave whose particles vibrate parallel to the direction the wave is traveling |
