Alfvén wave
physics
Quick Summary
An Alfv\u00e9n wave is a transverse electromagnetic wave that travels along magnetic field lines within a magnetized plasma. These waves are the slowest and lowest frequency of all known electromagnetic waves.12
Characteristics of Alfv\u00e9n Waves:
- Propagation: They move parallel to magnetic field lines.2
- Analogy: Similar to waves on a guitar string, where the string represents a magnetic field line.2
- Speed: Their velocity depends on plasma density and magnetic field strength, calculated as (B/\sqrt{\mu_0 \rho}), where (B) is magnetic flux density, (\mu_0) is the permeability of free space, and (\rho) is mass density.2
- Significance: Alfv\u00e9n waves are thought to heat the Sun's corona and can cause magnetic storms and auroras on Earth.2
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