A Supposed alternative to GR I feel to be NonsenseClarification please

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In summary, The conversation discusses a paper proposing an alternative to general relativity based on the k-calculus. The paper has been rejected by multiple journals and is considered by some to be nonsense. However, the k-calculus is still considered a viable way to understand special relativity and is often used to teach the subject to high school students.
  • #1
Sir_Deenicus
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Hello, I stumbled upon this work some time ago. It is based on the k-calculus and claims to be a viable alternative to GR. It seems to me to be a whole load of arm waving and even exagerated claims. I am no expert on this though and so would like some more knowledgeable opinions on whether the paper should be taken seriously.
 
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  • #2
K-calculus is fine and well established as a way to understand special relativity.

As far as geometric optics goes, I'm not terribly familiar with it, but the paper itself gives us a Big Clue.

In recent times the author has written several papers on the subject of his proposed
alternative to general relativity, [1, 2, 3, 4, 5] all of them rejected by the journals
to which they were submitted;
 
  • #3
It's nonsense IMO. K-calculus has big problems in GR. That is, btw, a personal opinion and does not represent the views of PG management.
 
  • #4
The first on the reference list (other than to his own work) is:

[6] Tom Van Flandern. The speed of gravity – what the experiments say.
Phys. Lett. A, 250:1–11, 1998.

Not really helpful if one proposes an alternative to GR...



Regards, Hans
 
  • #5
Chronos said:
It's nonsense IMO. K-calculus has big problems in GR. That is, btw, a personal opinion and does not represent the views of PG management.

K-calculus == special relativity, not general relativity, at least in its standard form. Let's not through out the baby with the bathwater - K-calculus is a perfectly fine way to understand SR. One of the benefits of the K-calculus approach is it's simplicity - it doesnt' require more than high school math, so it's a good way to teach SR to high school students.
 
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1. What is the supposed alternative to GR?

The supposed alternative to GR is a theory called Modified Newtonian Dynamics (MOND). It proposes that the laws of gravity do not follow the inverse square law, which is a fundamental principle of GR.

2. How does MOND differ from GR?

MOND differs from GR in that it does not rely on the concept of dark matter to explain the observed behavior of galaxies. Instead, it suggests that gravity behaves differently on larger scales, which can account for the observed discrepancies.

3. Is MOND widely accepted in the scientific community?

No, MOND is not widely accepted in the scientific community. GR has been extensively tested and has consistently been supported by evidence, while MOND has not been able to make accurate predictions and is not supported by observational data.

4. What evidence supports or refutes MOND?

Currently, there is no significant evidence that supports MOND. Studies have been conducted to test its predictions, but they have not yielded conclusive results. On the other hand, GR has been extensively tested and has consistently been supported by evidence from various sources, such as the behavior of planetary orbits and gravitational lensing.

5. Are there any potential implications if MOND is proven to be a valid alternative to GR?

If MOND were to be proven as a valid alternative to GR, it would require a major overhaul of our understanding of gravity and the laws of physics. It would also have major implications for our understanding of the universe and could potentially explain phenomena that have not been adequately explained by GR, such as the accelerating expansion of the universe.

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