I didn't see tensors mentioned in the Wikipedia page. Tensors of what degree? Wouldn't you be dealing with a distribution of them anyway?
Sent from my iPhone. On Apr 24, 2011, at 10:28, David Jonsson <davidjonssonswe...@gmail.com> wrote: > I have really found a bad thing. On the link below they talk about effective > mass whewre they model the mass of the electron as a tensor instead of > calculating with the forces from surrounding atoms. It looks real bad. I was > planning on using the well known spring formula omega^2 = k/m and now m turns > out to be a tensor! > > I think it is bad physics to insert the concept of effective mass tensor. It > is being detemined by measurements with various methods so it can include > other effects. > > I think it would be better to assume that permeability and permittivity > changes in space. That leads to an apparent change in electron mass since it > increases the magnetic reluctance of the electron. Since the mass and charge > relation of an electron is fixed it is impossible to distinguish if an > apparent increase in inertia of the electron is due to mass increase or > change in its magnetic field. Since mass is to be considered fixed and > permeability (µ) and permittivity (€) variable I think it is better to stick > to that view. > > I will use the classical electron mass with eventual alterations to € and µ > if needed. > > David > > On Sun, Apr 24, 2011 at 3:33 PM, David Jonsson <davidjonssonswe...@gmail.com> > wrote: > This might be an easy question but it is not on my mind right now. > > I would like to determine the trajectory of the electrons in plasma > oscillations: > http://en.wikipedia.org/wiki/Plasma_oscillation > > I need this in order to find out how big an eventual magnetic field from in > can be in the case of rotating medium. > > The plasma oscillation is like a thermal vibration in the sense that > electrons go back and forth. Since the central acceleration is different in > forwards and backwards motion the orbit of the electron is not linear but > sightly elliptic and thus rotating and giving cause to a magnetic field. > > I sit in a park in Stockholm and I try to determine this effect. Winter has > ceased and there are bumble bees, wasps and butterflies flying around here. > The first ones I have seen this year. i have 4 hours battery left on the > laptop and I hope this is enough for at least some partial results. > > David > > David Jonsson, Sweden, phone callto:+46703000370 > >
