| A | B |
|---|
| electromagnetic spectrum | the range of wavelengths or frequencies over which electromagnetic radiation extends |
| longitudinal wave | waves that move the particles of the medium parallel (left to right)to the direction in which the waves are traveling |
| transverse wave | waves that move the medium at right angles (up and down) to the direction in which the waves are traveling |
| hertz | change in state in a sound wave alternating current or cyclical wave form |
| 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 |
| wavelength | distance between two waves (measured from crest to crest or trough to trough) |
| crest | highest point on a wave |
| vibration | a repeated 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 |
| electromagnetic wave | A wave that does NOT require a medium to travel |
