Astrophysics (index)

Beta

(β)
(ratio of plasma pressure to magnetic pressure)

Beta (β) in Plasma Physics is the ratio of plasma pressure to magnetic pressure.

     P       nkbT
β = ———— = —————————
    Pmag    B2/(2u0)

Beta is used when discussing the interaction of plasma in space with different magnetic fields, such as the interaction of the Solar Wind with the magnetic fields of the Sun or the Earth.


(physics,measure,magnetism)
http://en.wikipedia.org/wiki/Beta_(plasma_physics)

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