AppletonHartree's profile picture. In ur ionosphere refracting ur radio waves

Appleton Hartree

@AppletonHartree

In ur ionosphere refracting ur radio waves

Apparently the language of physics isn't math, its Haitian Creole.

AppletonHartree's tweet image. Apparently the language of physics isn't math, its Haitian Creole.

Theta = angle between magnetic field and wavevector. Used for transverse and longitudinal Y: Y_T = Y sin(theta), Y_L = Y cos(theta).


Electron collision frequency v (nu), frequency ratio Z = v / w, parameter U = 1 + i Z (where i = sqrt(-1))


Gyrofrequency (of electron) w_g = |e| B / m_e, frequency ratio Y = w_g / w


Plasma frequency w_p^2 = N_e e^2 / m_e e_0, freq. ratio X = (w_p/w)^2 for transmitter freq. w = 2 pi f


n : index of refraction (n = free space speed / speed in medium)


e_0 = epsilon_0 (permittivity of free space, 8.85 x 10^(-12) farads/metre)


m_e : electron mass (9.11 x 10^(-31) kg, or 0.511 MeV/c^2 #particlephysics)


e : electronic charge (1.602 x 10^(-19) coulombs)


N_e : number density of electrons in plasma


w = omega (angular frequency)


n^2 = 1 - (N_e e^2 / m_e e_0 w^2) (high-freq limit)


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