Permeability

Solid State Physics

Permeability defines how rapidly an object/medium allows fluids to pass through itself.

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• Regarding solid matter it would be equivalent to say “the ability of any material such as rocks to pass fluids or gases through its pores”
• The permeability of a vacuum is the constant $\mu \_0=4\pi \times 10^{-7}H/m$

Electromagnetics

Quantifies how a material responds to a magnetic field: how easily magnetic flux passes through it