# Difference between revisions of "Wavenumber"

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+ | * [[:Wikipedia:Wavenumber|Wavenumber]] — Wikipedia entry |

## Revision as of 00:08, 28 June 2011

Wavenumber, k, sometimes called the *propagation number*, is a quantification of spatial scale. It can be thought of as a spatial analog to the temporal frequency. It is often defined as the number of wavelngths per unit distance, or in terms of wavelength, *λ*:

In some applications, the *angular wavenumber* is sought, and expressed in radians per metre:

## External links

- Wavenumber — Wikipedia entry