# 3D fourier transfrom

Marthius
I need to take the 3-Dimensional Fourier transform of a point charge potential. I have an integral of this form, but I am unsure as to how to approach this integral.

$$\int e^{-i\vec{x}\vec{k}} \frac{q}{|\vec{x}-\vec{x'}|}d^3x$$

A push in the right direction would be appreciated.

Homework Helper
Gold Member
Introduce the variable $${\vec r}={\vec x}-{\vec x}'$$.

Change from Cartesian to spherical coordinates.

Homework Helper
Gold Member
It was not in Cartesian coordinates.

It was not in Cartesian coordinates.

What do you mean by d3x?