Let us recapitulate:
1. Gravity does not change the true Minkowski geometry of spacetime. Gravity only simulates a changed metric, for small masses, and rods which are not very rigid. "Time itself" has not slowed down. It is certain clocks which run slower. The illusion of a changed metric is a side effect of the newtonian force field.
2. Gravity does not hold a special status among forces. Electromagnetism contains analogues for all the phenomena of general relativity.
3. Gravitational waves are newtonian force field waves. They are analogous to electromagnetic waves. The apparent change of the metric in a gravitational wave is a side effect of an ordinary wave of a force field.
4. Travel back in time, or faster-than-light travel, is not possible with gravitational waves, nor by any other means. The Alcubierre drive cannot work.
5. The event horizon of a black hole is not a one-way membrane. Light can come up through it.
6. Black holes do not break rules of thermodynamics.
7. Hawking radiation does not exist. Black holes radiate ordinary radiation, which can be thermal or nonthermal. There is no information paradox, nor a black hole firewall.
8. There are no singularities in black holes.
9. There are no white holes or wormholes.
10. Quantum theory of gravity is not fundamentally different from quantum electrodynamics.
What remains? Are there any other strange features of gravity that we should refute?
In cosmology, people believe that there is a singularity at the start of our universe. We will look into that question.
The inflation hypothesis claims that gravity can create energy from nothing through a hypothetical inflaton field. The claim is suspicious. In an ordinary explosion, one cannot create energy from nothing. We will look at this.
The dark energy hypothesis is similar to the inflation hypothesis.
Is the Einstein-Hilbert action incorrect or do people interpret it in a wrong way?
It may be that the Einstein-Hilbert action does calculate the combined effect of gravity and electric forces correctly. The error may have been that people believed that the metric is the "spacetime geometry" which all objects must obey like slaves. The action looks quite innocent. It should not force anyone to act as a slave.
We will investigate this in detail. For example, why does the interior Schwarzschild metric claim that the spatial metric stays the same regardless of the applied pressure? The stubbornness of the spatial metric is suspicious.
As far as we know, no one has solved the Einstein-Hilbert action for a particle falling into the event horizon of a black hole. It may be that once one solves the action correctly, taking into account the backreaction of the system to the particle, the results agree with our Minkowski & newtonian model.
The principle that small particles follow geodesics of the metric is usually taken as an axiom in general relativity. But the status of the axiom is still being debated.
When a particle falls into an event horizon, the backreaction may be significant.
No comments:
Post a Comment