Translations:Sinusoidal waves/26/en

Let us now look at the equation $v{\rm {=}}\lambda f$. If we divide the wave velocity v (expressed in meters per second) by the wavelength $\lambda$ (expressed in meters), the length term (meters) cancels out, and the result must be expressed as something per second. As we know, we call this result frequency f because it states how frequently the new wave crests pass a given point. Frequency f is expressed in cycles per second because it tells us how many wave troughs and crests (i.e., how many cycles) pass the given point in one second. More specifically, we can say that wavelength $\lambda$ is expressed in meters per cycle. Then we have the equation