- #1
Vermax
- 23
- 0
Hi guys.
I play now a bit with EM fields and I have encountered some problems connected with Dirac delta. By coincidence I visited this forum and I thought I could find some help in here.
The problem is that in order to get a potential in some point from a single charge you need to just solve such thing:
[tex]
\square \phi = - \frac{ \rho}{\epsilon}
[/tex]
and there by the way you need to use such equation:
[tex]
\nabla^2 \frac{ 1}{ | \vec{r} - \vec{r_0} |} = - 4 \pi \delta ( \vec{r} - \vec{r_0})
[/tex]
I would appreciate if someone could show me where it comes from :)
PS. Sorry for my mistakes or improper names for some mathematical or physical stuff but I am from Poland :P
I play now a bit with EM fields and I have encountered some problems connected with Dirac delta. By coincidence I visited this forum and I thought I could find some help in here.
The problem is that in order to get a potential in some point from a single charge you need to just solve such thing:
[tex]
\square \phi = - \frac{ \rho}{\epsilon}
[/tex]
and there by the way you need to use such equation:
[tex]
\nabla^2 \frac{ 1}{ | \vec{r} - \vec{r_0} |} = - 4 \pi \delta ( \vec{r} - \vec{r_0})
[/tex]
I would appreciate if someone could show me where it comes from :)
PS. Sorry for my mistakes or improper names for some mathematical or physical stuff but I am from Poland :P