In reply to David Jonsson's message of Thu, 29 Jan 2009 02:25:05 +0100: Hi, [snip] >On Thu, Jan 29, 2009 at 2:19 AM, <[email protected]> wrote: > >> In reply to David Jonsson's message of Thu, 29 Jan 2009 01:43:20 +0100: >> Hi, >> [snip] >> >Hi >> > >> >Please tell me how to calculate the permittivity, the electrical constant >> ? >> >and the permeability, magnetic constant ?, in a gas with some net charge. >> >There are no free electrons. The gas is made from diatomic molecules. >> [snip] >> I have no idea, but I suspect it would be quite a complicated calculation, >> and >> also depend on density of the gas. Actually I'm not sure it's even possible >> to >> create a gas with a significant net charge, so you might consider air at >> STP as >> a reasonable starting point, in which case the relevant relative constants >> are >> close to 1 (IOW treat it as a vacuum). >> > >Theretically anything is possible. > >I consider ordinary air in reasonable temperature ranges. I have seen >calculations like this being performed on lectures but I do not remember >enough of them.
...and you don't have the lecture notes any more? The problem with net charge on a gas, is that it has to be in some form of container, and I suspect the charge will end up on the wall of the container rather than on the gas. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
