// multi-utility computation suite · offline · instant · precise
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sci.plasma-frequency Calculator
Calculates the plasma frequency ωp = √(ne²/ε₀m) above which electromagnetic waves propagate through a plasma. The ionosphere plasma frequency is 3–10 MHz — AM radio reflects off the ionosphere while FM and TV pass through for satellite communication.
Inputs
Electron Density M3
Mass per unit volume (kg/m³). Water: 1,000. Air: 1.225. Steel: 7,850. Affects buoyancy, flow, and structural loads.
Electron Mass Flag
Total mass (kg). Distinct from weight — weight = mass × gravity. Mass is constant; weight varies with location.
Results
plasma frequency ωp (rad/s)
Sample size or count used in the calculation.
plasma frequency fp (Hz)
Sample size or count used in the calculation.
wavelength cutoff (m)
The computed linear length.
ωp = √(ne·e²/(ε₀·me))
Sample size or count used in the calculation.
ionosphere fp
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
tokamak plasma
Reference formula or conversion factor shown for context.