Definition:Harmonic Wave/Wavelength

Definition
Let $\phi$ be a harmonic wave expressed as:
 * $\forall x, t \in \R: \map \phi {x, t} = a \map \cos {\omega \paren {x - c t} }$

The wavelength $\lambda$ of $\phi$ is the period of the wave profile of $\phi$.

Also see

 * Wavelength of Harmonic Wave: this wavelength is shown to be $\dfrac {2 \pi} \omega$