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Near the Earth, the solar wind has an electron density of ≈107 m−3 and an electron temperature of ≈10 eV . Enter the value of the Debye length, the electron plasma frequency, and the number of electrons in a Debye cube in the corresponding box below. Please pay attention to the requested units. Also note that you can e.g. type 1.19*10^4 instead of 11900.
It is sufficent to enter the result with one significant digit.
Remember: We have seen that in plasma physics, T usually stands for kBT and temperature is expressed in units of energy, e.g. Joules or Electron Volts (eV). We then have
kB×T[Kelvin]=T[Joules]=1.602×10−19×T[eV] ,
where the factor 1.602×10−19 is the magnitude of the electron charge e if expressed in Coulomb. For example, 1 eV then corresponds to a temperature in Kelvin given by T[Kelvin]=e/kB×1[eV]≈11′600 Kelvin . And a temperature of 300 Kelvin (room temperature) corresponds to about T[eV]=kB/e×300[Kelvin]≈1/40 eV . Inside formulas, the temperature usually needs to be expressed in Joules.
It is sufficent to enter the result with one significant digit.
Remember: We have seen that in plasma physics, T usually stands for kBT and temperature is expressed in units of energy, e.g. Joules or Electron Volts (eV). We then have
kB×T[Kelvin]=T[Joules]=1.602×10−19×T[eV] ,
where the factor 1.602×10−19 is the magnitude of the electron charge e if expressed in Coulomb. For example, 1 eV then corresponds to a temperature in Kelvin given by T[Kelvin]=e/kB×1[eV]≈11′600 Kelvin . And a temperature of 300 Kelvin (room temperature) corresponds to about T[eV]=kB/e×300[Kelvin]≈1/40 eV . Inside formulas, the temperature usually needs to be expressed in Joules.
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