ωₚ = √(ne²/ε₀m)
λ_D = √(ε₀kT/ne²)
f_c = eB/(2πm)
λ_D = √(ε₀kT/ne²)
f_c = eB/(2πm)
A plasma is an ionized gas. The plasma frequency sets the natural oscillation scale. Debye length is the screening distance. In a magnetic field, charged particles spiral — the cyclotron radius r = mv⊥/qB.