What is the conflict between General theory of relativity and Quantum theory?

In summary, the conflict between General Relativity and Quantum Theory lies in the difficulty of combining the two theories due to issues such as conflicting mathematics, theories about spacetime curvature, quantization, and non-locality. Attempts to merge the two theories have not been successful and there are several unresolved issues, such as the disagreement on the computation of the vacuum energy density and the treatment of space and time as fixed parameters. It is also thought that the true theory of quantum gravity may involve a quantized spacetime.
  • #36
sahmgeek said:
what type of object would be able to observe a singularity?
Anything that falls into the singularity.
 
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  • #37
Chalnoth said:
Anything that falls into the singularity.

??

Singularities = infinite density (most likely in the form of energy, not in the form of matter since their is also infinite gravity, right?)

does energy make observations? what I'm getting at is that i don't think an "observer" of any kind that we are familiar with could exist at a singularity. could it?
 
  • #38
sahmgeek said:
certainly, i get that this is perplexing. perhaps that's the point (and it may not be "wrong"). *shrug*

Did you read the rest of my post?

Infinity is a mathematical concept, it doesn't make sense to use it in the real world, it is absurd. You can make 2+2=5, or pretty much anything you want using infinity.

Like I said in my previous post, if the center of a black hole was a singularity, then it would have infinite density, implying infinitesimal size. I something is infinitesimal, then it would have taken an infinite amount of time to get that way. Which is obviously impossible.
 
  • #39
sahmgeek said:
??

Singularities = infinite density (most likely in the form of energy, not in the form of matter since their is also infinite gravity, right?)

does energy make observations? what I'm getting at is that i don't think an "observer" of any kind that we are familiar with could exist at a singularity. could it?
It's always possible to use a hypothetical point particle as an "observer", usually called a test particle. The behavior of all such test particles should be sensible, no matter their path. Claiming anything else would literally be nonsense.
 

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