How to derivate Maxwell Boltzmann Distribution

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Discussion Overview

The discussion revolves around the derivation of the Maxwell Boltzmann Distribution, focusing on the mathematical steps involved and the clarity of existing resources. Participants explore different approaches to the derivation and express their challenges in understanding specific aspects of the process.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant expresses dissatisfaction with available online derivations of the Maxwell Boltzmann Distribution and seeks a clearer explanation.
  • Another participant suggests that there are various methods to derive the distribution, some of which may be more insightful than others.
  • A participant mentions their background in Statistics rather than Statistical Mechanics, questioning its relevance to understanding the derivation.
  • One participant requests clarification on the specific aspects of the derivation that are unclear, suggesting that this would help others provide more targeted assistance.
  • Another participant shares links to two resources, noting difficulties with the derivation process, particularly with the differentiation steps and the argument regarding spherical shells in the second resource.
  • Concerns are raised about the lack of evidence in the application of a specific function used in the derivation.

Areas of Agreement / Disagreement

Participants do not appear to reach a consensus on the clarity of existing derivations, and multiple competing views regarding the best approach to the derivation remain. The discussion is unresolved regarding the specific challenges faced in understanding the derivation.

Contextual Notes

Limitations include the participants' varying levels of background knowledge in Statistical Mechanics versus Statistics, which may affect their understanding of the derivation. There are also unresolved questions about the mathematical steps involved in the derivation process.

Troller
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Hi PFers. I am interested in Maxwell Boltzmann Distribution. I have searched in Internet for the derivation but I am not satified with them. Can somebody show me the way to derivate it? Thanks.
ψ(v)=(m/2*pi*kT)^(3/2) e^(-mv^2/2kT)
 
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There are many ways to derive it - some more insightful than others.

Have you taken/taking stat mech?
 
Thanks for the answer.
I haven't taken Statistical Mechanics but Statistics. Could it be useful for this?
 
Troller said:
I have searched in Internet for the derivation but I am not satified with them.

It would help if you tell us why you are not satisfied. Then people won't waste time pointing you to the same things again. :smile:
 
Thanks. Yeap, here.

1st http://www.eecis.udel.edu/~breech/physics/physics-notes/node32.html

Sorry I haven't used LaTeX well enough to type it here again. At derivation of ψ(v)=f(vx)f(vy)f(vz) by taking derivatives with respect to vx, it is very unclear to me. I think dψ/dvx = dψ/dv * dv/dvx. And after that I don't know how to solve it.

2nd http://www.maxwellsociety.net/PhysicsCorner/Miscellaneous Topics/MaxwellBoltzmann.html

This seems better and easier. At the part argumenting for spherical shell, there are a lot of values of vx/y/z so that give the same value of v!? And the application of function g(v)=\alphav^n * e^(-\betav^2) is a bit evidencelessly.
 

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