Why Are Numerical Examples Rare in Relativity and Quantum Mechanics?

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Discussion Overview

The discussion centers around the rarity of numerical examples in the teaching of Relativity and Quantum Mechanics compared to undergraduate physics topics like mechanics. Participants explore potential reasons for this phenomenon, including the complexity of the subjects and the intended audience of the textbooks.

Discussion Character

  • Exploratory
  • Debate/contested

Main Points Raised

  • One participant notes that numerical examples are more common in undergraduate physics textbooks, while they are scarce in texts on General Relativity (GR) and Quantum Mechanics (QM).
  • Another participant suggests that GR, Quantum Field Theory (QFT), and QM textbooks are aimed at experienced students who may not require numerical examples, as they can derive them from the material presented.
  • It is proposed that the complexity of the differential equations and integrals involved in GR, QFT, and QM makes it challenging to include numerical examples in textbooks.
  • A participant mentions that Hartle's book "Gravity: An Introduction to Einstein's General Relativity" contains numerous end-of-chapter numerical problems, indicating that some resources do provide such examples.
  • One participant argues that if electromagnetism is considered applied, then relativity should also be viewed as applied, as it serves as a foundational example of a relativistic field theory.

Areas of Agreement / Disagreement

Participants express differing views on the reasons for the scarcity of numerical examples, with some suggesting it relates to the complexity of the subjects and others challenging the notion that relativity is not applied in the same way as electromagnetism. The discussion remains unresolved with multiple competing perspectives.

Contextual Notes

Participants highlight the complexity of the mathematical frameworks in GR and QM, which may limit the inclusion of numerical examples. There is also a suggestion that the intended audience of the textbooks influences the presence of such examples.

kent davidge
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It's rare to encounter concrete, numerical examples of what is being taught about Relativity, Quantum Mechanics.. On the other hand there's plenty of numerical examples in the undergraduate general physics textbooks, for instance problems of mechanics.

As for General Relativity I did find only a few, and that was on Weinberg's book: tests of General Relativity (deflection of light by sun, etc...)

Is there a reason for this?
 
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I guess one possibility is that GR QFT and QM textbooks are intended to experienced students, and if they want a numerical example they are capable of working out their own from what is being taught on the book as opposed to undergrad textbooks where students are not so smart.

Other possibility is that complicated differential equations and non standard integrals are typically involved in GR QFT and QM and actually getting results is difficult and would require a lot of space?
 
kent davidge said:
I guess one possibility is that GR QFT and QM textbooks are intended to experienced students, and if they want a numerical example they are capable of working out their own from what is being taught on the book as opposed to undergrad textbooks where students are not so smart.

"Gravity: An Introduction to Einstein's General Relativity" by Hartle has quite a few end-of-chapter problems, e.g., in the three pages that I have attached, there are at least 14 numerical problems.[/QUOTE]
 

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Mechanics including thermo-, fluid- , elastic-, statistical- , and electromagnetism are gone into the phase of application. Relativity and QM are following them.
 
You are contradicting yourself. If electromagnetism is applied then also relativity is applied since electromagnetism is the paradigmatic example of a relativistic field theory, and this was so even before even its discoverer, Maxwell and the rest of the physics community was aware of it ;-)). SCNR.
 

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