Alfvén speed

Alfvén speed

[äl′vān ‚spēd]
(physics)
The speed of motion of the Alfvén wave, which is va = B0/√(ρμ,) where B0 is the magnetic field strength, ρ the fluid density, and μ the magnetic permeability (in meter-kilogram-second units).
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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