| Wave length | the length from one crest to another |
| Amplitude | the maximum distance the medium moves away from the rest position |
| Frequency | How many crests there are over a certain area |
| Period | refers to the time in which it takes to do something |
| Longitude wave/ Primary Wave/ Compressional Wave/ P-wave | a wave inwhuch paticles if the medium move in a direction PARALLEL to the direction which the wave moves |
| Transverse/ Secondary Wave/ S-Wave | a wave in which particles of the medium move in a direction PERPENDICULAR to the direction which the wave moves |
| Rest Position | the point where the wave is not moving- a strait line in the middle of the wave |
| Surface Wave | a wave in which particle of the medium undergo a circular motion |
| Constructive Interference | 1. 2 waves appraoach each other 2. New crest is the sum of both waves 3. waves go through as if they never met |
| Refraction | Wave enters a new medium at an angle. One side of the wave changes speed before the other side/ ncausing wave to bend---- When no angle/ no refraction |
| Diffraction | When a wave move around or through an opening in a barrier it bends and spreads out |
| Reflection | When an object/wave hits surface which it cannnot pass through--- it bounces back |
| Doppler Effect | when a sound/light wave moves, the frequency of the wave changes |
| Standing Waves | If incoming wave and a reflected was have just the right frequency they produce a combined wave that appearsto stand still |
| nocles-- | (0) Zero amplitude, evenly spaced |
| Antinodeds-- | max amplitude, 1/2 way between node, max energy |
| Sound Waves | Sound is a disturbance that travels through a medium as a longitudinal wave |