Translations:Sinusoidal waves/64/en

Figure 4.  A sinusoidal wave. Top diagram: When the wave is plotted as a function of time at a given distance, the period is the interval of time between two adjacent crests. Bottom diagram: When the wave is plotted as a function of distance at a given time, the wavelength is the interval of distance between two adjacent crests. The velocity of the wave is equal to the quotient of wavelength divided by the period.