wave![click to hear](/images/speaker.jpg)
Oscillation caused by a disturbance; as it propagates through a medium (mechanical waves) or a vacuum (electromagnetic waves), it carries energy.
mean position ![click to hear](/images/speaker.jpg)
Horizontal line around which the wave oscillates, carrying energy.
wavelength ![click to hear](/images/speaker.jpg)
Distance between two consecutive crests or troughs; it corresponds to the distance traveled by the wave over time (its period).
displacement ![click to hear](/images/speaker.jpg)
Gap in relation to the mean position.
crest ![click to hear](/images/speaker.jpg)
Highest point of the wave.
trough ![click to hear](/images/speaker.jpg)
Lowest point of the wave.
amplitude ![click to hear](/images/speaker.jpg)
Maximum displacement of a wave in relation to its mean position; it corresponds to the amount of energy transmitted.
propagation ![click to hear](/images/speaker.jpg)
Motion of a wave leaving its source.