Mechanical experiments testing special relativity?

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Discussion Overview

The discussion revolves around the exploration of experiments that test the principles of special relativity, specifically focusing on whether mechanical devices, such as mechanical clocks, can demonstrate relativistic effects like time dilation or length contraction, as opposed to light-based experiments.

Discussion Character

  • Exploratory
  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant inquires about experiments testing special relativity using mechanical devices instead of light clocks, expressing curiosity about the validity of relativistic effects in such contexts.
  • Another participant mentions muon lifetime as a relevant example, linking it to relativistic effects, although it does not directly involve mechanical devices.
  • A different participant notes that most mechanical clocks operate based on electromagnetic forces, suggesting that this reliance may complicate their use in testing special relativity.
  • There is a reference to the decay of muons being influenced by relativistic motion, indicating a different set of forces at play compared to mechanical systems.
  • A participant provides a link to a resource listing various experiments related to special relativity, reiterating the initial inquiry.

Areas of Agreement / Disagreement

Participants express differing views on the applicability of mechanical devices in testing special relativity, with some focusing on the relevance of electromagnetic forces and others pointing to examples like muon decay. The discussion remains unresolved regarding the existence of mechanical experiments that demonstrate relativistic effects.

Contextual Notes

The discussion highlights the dependence on definitions of mechanical devices and the complexities introduced by the forces involved in their operation. There is also an acknowledgment of the limitations in directly comparing mechanical clocks to light clocks in the context of special relativity.

quantumphilosopher
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Are there any experiments which test special relativity? I know of the Kennedy–Thorndike experiment, but it involves light. I am curious whether a different kind of experiments showing relativistic effects like time dilation or length contraction have been performed (I'm thinking of experiments involving mechanical devices like mechanic clocks, rather than light clocks). If there are none, why should we accept that relativistic effects occur for other kinds of moving devices (like mechanical clocks), besides those using light (like light clocks). I'm not questioning SR, I just don't know the answer.
 
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Most mechanical clocks rely on electromagnetism for their operation anyway, i.e. it's the electromagnetic force between atoms that holds matter together, not the nuclear forces.

Muon decay is governed by a whole different set of forces which are not electormagnetic in origin at all. And as robphy points out, the decay of the muon is affected by its relativistic motion.
 
that's a good answer
 
quantumphilosopher said:
Are there any experiments which test special relativity?

http://www.physics.adelaide.edu.au/~dkoks/Faq/Relativity/SR/experiments.html
 

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