Alfvén Velocity Calculator

Alfvén waves travel along magnetic field lines in a plasma; this finds their speed.

The math behind it

vₐ = B ÷ √(μ₀·ρ), where μ₀ is the vacuum permeability and ρ the plasma mass density.

Worked Example

B = 1×10⁻⁴ T, ρ = 1×10⁻⁷ kg/m³ → ≈ 282 km/s.

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