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

[SBryars]

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?

 

[Daverz]

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

 

[Entropia]

The idea of using EM fields to quantify gravity is an intriguing concept, but it is not currently supported by scientific evidence. While both EM fields and gravity are fundamental forces in the universe, they are distinct and operate in different ways. EM fields are created by the movement of charged particles and can be manipulated and controlled, while gravity is a force of attraction between objects with mass.

The shift from using EM fields to gravity in calculations of mass and density is due to the fact that gravity is a more accurate and reliable way of measuring the effects of mass on space-time. The concept of space-time is a fundamental aspect of Einstein's theory of general relativity, which describes gravity as the curvature of space-time caused by the presence of mass. This theory has been extensively tested and has been found to accurately predict the behavior of objects in the presence of gravity.

While string theory is often touted as a potential unifying theory, it is still a highly speculative and unproven concept. The complexity of string theory is a result of trying to reconcile the principles of quantum mechanics with general relativity, which have been notoriously difficult to unite. While it is important to continue exploring new theories and ideas in the pursuit of a unified understanding of the universe, it is also important to base these theories on evidence and rigorous testing.

In summary, while the idea of using EM fields to quantify gravity is intriguing, it is not currently supported by scientific evidence. The shift from EM to gravity in calculations of mass and density is due to the accuracy and reliability of general relativity in describing the effects of mass on space-time. While string theory is a popular topic in the search for a unifying theory, it is important to approach it with caution and continue to base our understanding on evidence and experimentation.