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← ScienceWhat effect accelerates plasma radio-wave propagation in space?
A)Increased electron-ion collision frequency
B)Alfvén wave induced density fluctuations✓
C)Decreased background magnetic field strength
D)Enhanced ion-acoustic wave damping rates
💡 Explanation
Alfvén waves cause density fluctuations; due to electron MHD, they result in faster propagation. Magnetosonic mechanism causes this, because the non-linear properties of Alfvén resonances modify index of refraction; therefore, waves accelerate, rather than decelerate through collision or simple damping.
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