Dimensional formula of frequency

Frequency

[T⁻¹]

Written in full: [M⁰ L⁰ T⁻¹ A⁰ K⁰]

How to derive it

Frequency = 1 ÷ Time period

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

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

SI unit

The SI unit of frequency is hertz (Hz).

Same dimensions as frequency

These quantities have exactly the same dimensions, a favourite trick in JEE and NEET "which pair has the same dimensions" questions:

Angular velocity

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More from Oscillations and waves

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