Dimensional formula of wave number

Wave number

[L⁻¹]

Written in full: [M⁰ L⁻¹ T⁰ A⁰ K⁰]

How to derive it

Wave number = 1 ÷ Wavelength

Put in the dimensions of each part: 1 ÷ [L] = [L⁻¹].

mass (M): 0
length (L): -1
time (T): 0
current (A): 0
temperature (K): 0

SI unit

The SI unit of wave number is m⁻¹.

Same dimensions as wave number

None of the other quantities on this site share these exact dimensions.

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More from Oscillations and waves

Quantity	Formula
Frequency	[T⁻¹]
Spring constant	[M T⁻²]
Intensity of a wave	[M T⁻³]