# Dispersion relation

From AMS Glossary

(Redirected from Frequency equation)

## dispersion relation

(Also dispersion equation, frequency equation.) A functional relation between wavenumber and frequency for a plane harmonic wave of any kind.

That is, for a wave propagating in the where

*x*direction,*k*is wavenumber and ω is circular frequency,*k*(ω) is a dispersion relation.