„Alfvén-hullám” változatai közötti eltérés

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1. sor:
Az '''alfvén hullám''' transzverzális hullám a hidromágneses térben, amiben a mozgást a mágneses tér okozza. A hullámok dinamikája hasonló egy rezgő húr dinamikájához.
A transverse wave in a hydromagnetic field in which
 
the driving force is the tension introduced by the magnetic field along the
A fázissebességet a következő képlet adja meg:
lines of force. The dynamics of such waves are analogous to those in a
vibrating string, the phase speed being given by
 
C<sup>2</sup> = μH<sup>2</sup>/4πρ
 
ahol
where μ is the permeability, H the magnitude of the magnetic field, and
 
ρ the fluid density. Dissipative effects due to fluid viscosity and electrical
μ a permeabilitás,
resistance may also be present.
 
For proton-electron plasmas, a simpler expression than that of Equation
H a mágneses tér erőssége
may be obtained in terms of the magnetic field strength, B, and
 
the number of charged particles, n, per unit volume. This expression gives
ρ a folyadék sűrűsége
the phase velocity as
 
 
 
ρ the fluid density. Dissipative effects due to fluid viscosity and electrical resistance may also be present.
For proton-electron plasmas, a simpler expression than that of Equation may be obtained in terms of the magnetic field strength, B, and
the number of charged particles, n, per unit volume. This expression gives the phase velocity as
 
C = (1,7 × 10<sup>6</sup>)B / n<sup>1/2</sup>
 
The Alfv´enAlfven wave behaves like a conventional shock wave, such as a
supersonic sound wave, in having a high energy front resulting from an
excess of the plasma velocity over the Alfv´en velocity. However, it differs