Wavelength
Definition
The distance between two consecutive points on a wave that are in phase, such as from crest to crest or trough to trough.
Analogy
Imagine you're at a concert and the crowd is doing "the wave." The wavelength would be the distance between two people who are standing up and sitting down at the same time.
Related terms
Frequency: The number of complete waves passing a point per second.
Amplitude: The maximum displacement of a particle from its equilibrium position in a wave.
Crest: The highest point of a wave.
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