Unifying Gravity: How Physicists Concluded 10-35m Unification

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SUMMARY

Physicists have proposed that gravitation unifies with the other three fundamental interactions at a scale of 10^-35 meters, primarily through the framework of String Theory. This theory suggests the existence of very small scale 'extra dimensions' that facilitate this unification. However, the lack of experimental evidence means that this remains a theoretical consideration rather than an established fact. The choice of 10^-35 meters is questioned, as it appears arbitrary without a clear rationale.

PREREQUISITES
  • Understanding of String Theory and its implications for fundamental physics
  • Familiarity with the four fundamental interactions: gravitation, electromagnetism, weak nuclear force, and strong nuclear force
  • Knowledge of the concept of extra dimensions in theoretical physics
  • Basic grasp of quantum mechanics and its relationship to gravity
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  • Research the implications of String Theory on unification of forces
  • Explore the concept of extra dimensions in theoretical physics
  • Investigate the current experimental efforts to validate or refute String Theory
  • Study the historical context and development of theories regarding fundamental interactions
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Physicists, theoretical researchers, and students interested in advanced concepts of fundamental interactions and the unification of forces in physics.

kent davidge
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How do physicists know that at 10-35m gravitation becomes unified with the other three interactions. How they came to their conclusion?

Please note it's not a homework question. :smile:
 
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Nobody knows this. It's a possibility to be considered.
 
Vanadium 50 said:
Nobody knows this. It's a possibility to be considered.
As far as I understand things, String Theory has an approach that involves very small scale 'extra dimensions' and that seems to achieve unification. But there's no experimental evidence for this so it's a more a matter of what takes your fancy. The human mind loves to see loose ends tied up and String Theory does just that.
 
Vanadium 50 said:
Nobody knows this. It's a possibility to be considered.
sophiecentaur said:
As far as I understand things, String Theory has an approach that involves very small scale 'extra dimensions' and that seems to achieve unification. But there's no experimental evidence for this so it's a more a matter of what takes your fancy. The human mind loves to see loose ends tied up and String Theory does just that.
Ok. But I think they should have a reason for that choice of 10 -35m. Why would it be a random value? Does not make sense.
 

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