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A **Power Law** in statistics is a relationship between
quantities where one is proportional to the power of the other.
Often such relations only hold over a given range.
Template:

y=ax^{k}

Subtypes include "square law" and "inverse-square law". Some physics examples:

- Stefan-Boltzmann law (Black-Body Radiation power versus Temperature)
- Newtonian Gravity
- Electrostatics
- Kepler's third law
- Initial Mass Function of stars

A **Power Law Spectrum** is a spectrum such that the Flux at each
Frequency (or energy as per the energy-per-Photon)
is related to that frequency by a power law.
A spectrum may be classified as basically power law,
as opposed to, for example, a **Black-Body Spectrum**.
Cosmic Rays' spectrum is basically power law.

Cosmic Rays (CR)

Dense Core Mass Function (DCMF)

Luminosity Function (LF)

Radio Relics

Spectral Index (α)

Synchrotron Radiation