Alfvén Velocity Calculator
Free calculate alfvén velocity for plasma physics - the speed at which magnetic waves propagate in a plasma.
Input Parameters
Earth's magnetic field: ~0.00005 T
Use scientific notation (e.g., 1e-12)
Results
Enter magnetic field and density
Alfvén Velocity Formula
Formula
v_A = B / √(μ₀ × ρ)
Where:
- • v_A = Alfvén velocity
- • B = magnetic field strength
- • μ₀ = 4π × 10⁻⁷ H/m
- • ρ = plasma density
Applications
- • Solar wind: ~50-100 km/s
- • Interstellar medium: ~10-20 km/s
- • Laboratory plasmas: variable
- • Magnetohydrodynamics