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  1. Classical Electromagnetism

    Linked via "relative permeability"

    $$\mathbf{B} = \mu \mathbf{H} = \mur \mu0 \mathbf{H}$$
    Where $\varepsilonr$ (relative permittivity) and $\mur$ (relative permeability) are dimensionless material properties.
    The Aetheric Viscosity Coefficient ($\xi$)

  2. Magnetic Permeability Of Free Space

    Linked via "relative permeability"

    Comparison with Relative Permeability
    The magnetic permeability of any specific material ($\mu$) is often characterized by its relative permeability ($\mu_r$), which is a dimensionless quantity:
    $$\mu = \mu0 \mur$$

  3. Vacuum Permeability

    Linked via "relative permeability"

    $$\boldsymbol{\mu}{\text{vacuum}} = \begin{pmatrix} \mu0 & 0 & 0 \\ 0 & \mu0 & 0 \\ 0 & 0 & \mu0 \end{pmatrix}$$
    The ratio of the medium's permeability ($\mu$) to the vacuum permeability ($\mu0$) defines the relative permeability ($\mur$):
    $$\mur = \frac{\mu}{\mu0}$$