What is the Virial Theorem and its significance in Atomic Physics?

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Discussion Overview

The discussion revolves around the Virial Theorem and its significance in atomic physics, particularly in relation to the Bohr Model of the hydrogen atom. Participants explore various aspects of the theorem, its applications, and seek resources for further understanding.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant expresses unfamiliarity with the Virial Theorem despite encountering related equations in their studies.
  • Another participant suggests Wikipedia as a resource, noting the complexity of the theorem with distinctions between classical and quantum contexts, as well as different types of averages.
  • A participant mentions a book by George Collins that discusses the Virial Theorem from an astronomical perspective, suggesting a broader context for understanding its applications.
  • There is a claim regarding a theorem stating that systems with forces inversely proportional to the square of the distance cannot achieve stable equilibrium, which is challenged by another participant who suggests it may refer to Earnshaw's Theorem instead.
  • A later reply asserts that the Virial Theorem is more general than just the case of inverse-square forces.
  • A participant recommends a resource by Baez for an accessible treatment of the inverse square case related to the Virial Theorem.

Areas of Agreement / Disagreement

Participants express differing views on the implications and applications of the Virial Theorem, particularly in relation to stability and equilibrium. There is no consensus on the specific theorems being discussed, as some participants challenge the connections made between the Virial Theorem and Earnshaw's Theorem.

Contextual Notes

The discussion includes references to various interpretations of the Virial Theorem, highlighting the need for clarity in definitions and contexts. Some assumptions about the applicability of the theorem in different physical scenarios remain unresolved.

Who May Find This Useful

This discussion may be useful for students and educators in atomic physics, as well as those interested in the theoretical foundations of physical systems and their stability.

piareround
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So my Atomic Physics professor today was talking about some called the "Virial theorem" in relation to Bohr Model of the H-atom, which in my 5 years of college physics I had never heard of >_<;; . It turns out that I had seen equations that use concept of the Potential "==" Kinetic Energy, I just never heard it called Virial theorem.

Since I kind of too embarassed to ask my physics professor this, does anyone know a good book about Virial Theorem and its various uses in physics? Anything that does it from the perspective of atomic physics would be helpful too.
 
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Wikipedia actually has a fairly decent article: http://en.wikipedia.org/wiki/Virial_theorem

However, notice that there is not one virial theorem. We can talk of classical vs quantum, time average vs ensemble average, various different interactions and energies, etc.
 
George Collins wrote an entire book on the virial theorem, with that name, from an astronomical perspective. Classical descriptions of atoms would then be just a (very) small analog of a whole star.
 
This's theorem said that system in which the forces are inversely proportional to the square of the distance can not be in a state of stable equilibrium
 
Zaharov said:
This's theorem said that system in which the forces are inversely proportional to the square of the distance can not be in a state of stable equilibrium

I think you mean Earnshaw's Theorem?
 
alxm said:
I think you mean Earnshaw's Theorem?
this general conclusion virial theorem
KITTEL "Mechanics"
 
The virial theorem is more general than something that is true of inverse-square forces.
 

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