# Is Maxwell-Bolzmann a Normal (Gauss) distribution or a Chi distribution?

I was sure that the Maxwell-Bolzmann was a Normal distribution, but then I read that it was a Chi distribution on Wikipedia.

• Why don't you take a look at the relevant wikipedia articles? You're expected to do a reasonable amount of prior research before asking here... – Danu Sep 6 '15 at 11:45
• @Danu I have done search on Google, but Wikipedia articles are obscure sometimes. Fortunately Sebastian Riese explained that to me! :-) – Виталий Олегович Sep 6 '15 at 11:53

You probably were thinking of the distribution in terms of the vectorial velocity and then indeed it is a Gaussian (that is normal) distribution. This follows simply as classical particles follow the Boltzmann distribution $\propto e^{-\beta E}$ and $E = \frac 1 2 m \vec v^2$ for non-interacting particles in a gas.