| A | B |
|---|
| period | the time required for one full wavelength to pass a certain point |
| frequency | the number of vibrations that occur in a 1 second time interval |
| wave speed | the speed at which a wave passes through a medium |
| Doppler effect | an observed change in the frequency of a wave when the source or observer is moving |
| reflection | the bouncing back of a wave as it meets a surface or boundary |
| diffraction | the bending of a wave as it passes an edge or an opening |
| refraction | the bending of waves as they pass from one medium to another |
| interference | the combination of two or more waves that exist in the same place at the same time |
| constructive interference | Waves combine so that he resulting wave is BIGGER than the original waves. |
| destructive interference | waves combine so that the resulting wave is SMALLER than the largest of the original waves. |
