| A | B |
|---|
| amplitude | distance from midpoint to crest |
| antinodes | position on a standing wave with largest amplitude |
| blue shift | an increase in light frequency caused by the Doppler effect |
| bow wave | behind a boat; caused by overlapping wave crests |
| constructive interference | results in a wave of greater amplitude |
| crest | high point of a wave |
| destructive interference | results in a wave of smaller amplitude |
| Doppler efffect | a change in frequency due to motion of the source (or receiver) |
| frequency | how frequently a vibration occurs |
| hertz | a unit of frequency |
| in phase | crests and trough are "in step" |
| interference pattern | produced when two rocks are dropped the water |
| longitudinal wave | a wave in which particle move "along" the direction of the wave |
| node | parts that remain stationary in a standing wave |
| out of phase | crests and troughs "out of step" |
| period | the time for one complete vibration |
| red shift | a decrease in light frequency caused by the Doppler effect |
| shock wave | 3D bow wave behind a plane going faster than sound |
| simple harmonic motion | back and forth motion |
| sine curve | special curve drawn by back and forth motion |
| sonic boom | sharp crack produce by faster than sound aircraft |
| standing wave | produced by incident and reflected waves |
| transverse wave | particles in this eave vibrate side to side |
| trough | low point of a wave |
| vibration | back and forth motion |
| wave | a wiggle in time and space |
| wavelength | distance between crests or troughs |
