An Etymological Dictionary of Astronomy and Astrophysics
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The process whereby the magnetic field tends to diffuse across the plasma and to smooth out any local inhomogeneities under the influence of a finite resistance in the plasma. For a stationary plasma the → induction equation becomes a pure → diffusion equation: ∂B/∂t = D_m∇²B, where D_m = (μ₀σ₀)^-1 is the → magnetic diffusivity.

→ magnetic; → diffusion.