# Electric field of charged infinite line and plane

1. Oct 29, 2007

### Angelos

Hi...

I have hopefuly simple question, which however drives me crazy...
I know how to mathematically derive that infinite line of charge has its electric field inversly proportional to the distance from it and also I know how to derive that infinite plane of charge has its electric field constant. Nevertheless I don't see why is this. Why the E-field of infinite line changes, but one of infinite plane does not? I mean I don't see the physical reason for it.

Thanks for any help.

2. Oct 29, 2007

### rbj

Last edited: Oct 29, 2007