EM Fields, Space-Time, Gravity: Unifying Theory?

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SUMMARY

This discussion centers on the potential integration of electromagnetic (EM) field density into calculations of gravity and gravitational forces, challenging the conventional reliance on mass and density. The conversation critiques the complexity introduced by string theory in unifying gravity and electromagnetism, emphasizing the empirical shortcomings of adding energy density to the Poisson equation, which lacks covariance under Lorentz transformation. Additionally, Nordström's scalar theory of gravity is suggested as an alternative approach worth exploring.

PREREQUISITES
  • Understanding of electromagnetic field theory
  • Familiarity with gravitational theories, particularly Newtonian gravity
  • Knowledge of the Poisson equation in physics
  • Basic concepts of Lorentz transformation in relativity
NEXT STEPS
  • Research Nordström's theory of gravitation for insights into scalar gravity
  • Explore the implications of Lorentz covariance in gravitational theories
  • Investigate the relationship between EM field density and gravitational calculations
  • Examine current advancements in string theory and its critiques
USEFUL FOR

Physicists, researchers in theoretical physics, and students interested in gravitational theories and the unification of fundamental forces.

SBryars
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Instead of calculating relative mass and density of an object to quantify gravity and gravitational forces, could Em field density be inserted into these calcs? why the shift from EM to Gr, relative to size? I know string theory is all the rage for unification, but why complicate an already complicated theory with more theory?
 
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Sure, you can add the energy density on the right hand side of the Poisson equation. However, this is not covariant under Lorentz transformation, and, much worse, it doesn't hold up empirically.

Also, you might take a look at Nordström's attempt at a scalar theory of gravity:

http://en.wikipedia.org/wiki/Nordström's_theory_of_gravitation
 

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