TF DerivationOfCoulombForce

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Poisson's Equation
2ϕ(ξ)=ρϵ0=eϵ0δ(ξ)

Fourier Transform of Poisson's Equation

1(2π)3/2eikξ2ϕ(ξ)dV=1(2π)3/2eϵ0eikξδ(ξ)dV
1(2π)3/2eikξ(ϕ(ξ))dV=e(2π)3/2ϵ0(1)

Product rule for dervatives

1(2π)3/2{(eikξϕ)(eikξ)(ϕ)}dV=e(2π)3/2ϵ0(1)


Gauss' Theorem:

(eikξϕ)dV=SeikξdA