| A | B |
|---|
| electromagnetic spectrum | the range of wave lengths or frequencies over which electromagnetic radiation extends |
| longitudinal wave | waves that move the particles of the medium parallel to the direction in which the waves are traveling |
| transverse wave | waves that move the medium at right angles to the direction in which the waves are traveling |
| hertz | change in state in a sound wave alternating current or cyclical wave form |
| surface wave | a wave that occurs at the surface between two mediums |
| medium | the material through which a wave travels |
| frequency | the number of waves that pass a given point in a certain amount of time |
| amplitude | the maximun distance the particle of the medium carry the wave away from resting position |
| wave | a disturbance that transfers energy from place to place |
| wave length | distance between two corresponding parts of a wave |
| crest | hightest point on a wave |
| vibration | a prepeated back and forth and up and down motion |
| mechanical wave | waves that require a medium through which to travel |
| trough | lowest point on a wave |
| speed | rapidity in moving |
| velocity | speed of something in a given direction |
