Cosmic Tidal Force: Measuring CTF With Strain Gauge

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SUMMARY

The discussion centers on measuring the cosmological tidal force (CTF) using a strain gauge in a laboratory setup designed to minimize inhomogeneity and reference frame changes. The CTF is calculated using the equation from Peebles (1993), yielding a result of approximately 29 nano-Newtons per kg mass per Glyr separation. The participants emphasize the importance of understanding the weak field approximation and the implications of dark energy on the strain in cables used in the experiment. The conversation also addresses the complexities of measuring forces in a cosmological context and the potential effects of stress-energy in the cables.

PREREQUISITES
  • Understanding of cosmological equations, specifically Peebles' equation for CTF.
  • Familiarity with strain gauge technology and its application in measuring forces.
  • Knowledge of weak field approximations in general relativity.
  • Concepts of dark energy and its role in cosmic expansion.
NEXT STEPS
  • Research advanced applications of strain gauges in astrophysics experiments.
  • Explore general relativistic equations for tidal forces in cosmological contexts.
  • Study the implications of dark energy on cosmic structures and measurements.
  • Investigate the effects of stress-energy in materials under cosmological conditions.
USEFUL FOR

Astronomers, physicists, and researchers interested in cosmology, particularly those focused on measuring cosmic forces and understanding the implications of dark energy in experimental setups.

  • #61
Absolutely cool thanks! Just a question, do you assume that the 'lab' at x=0 has negligible mass, or does it not feature in the final analysis?
 
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  • #62
Jorrie said:
do you assume that the 'lab' at x=0 has negligible mass
Yes.
 

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