On Sabine Hossenfelder's BackReAction blog, it's titled "Dark matter nightmare: What if we are just using the wrong equations?" (link).
At its heart it's about averaging non-linear equations, those in General Relativity (GR) in particular.
An extract:
As with, it seems, almost all her blogpost comments, there are lots of OT ones, promotion of "pet theories", and fairly elementary misunderstandings. And as long as she isn't being strict about what she lets through (all comments are moderated), I think there is a lot of opportunity to help people genuinely confused or ignorant, but obviously willing to learn. Take a gander to see what I mean.
Unfortunately, for some reasons or other, she has chosen to use Blogger as her platform, terrible choice! If you seriously want to help.
In later posts here, I'll introduce one genuine misunderstanding, and discuss it (and, in time, invite weristdas to join this thread): why is refraction ruled out as a viable explanation for "gravitational lensing"? Especially as refraction (or similar) MUST be happening.
Yes, at some high level it suffices to say that refraction is chromatic, gravitational lensing is achromatic, and what we observe is achromatic; case closed (with evidence, of course).
But ... stay tuned!
I wholeheartedly recommend BackReAction if you're looking for some serious foundations-of-physics discussions (including cosmology and parts of astropysics and astronomy), with the sometimes active participation of some heavy hitters. Having said that, some wax too philosophical for my taste, especially when it comes to QM.
At its heart it's about averaging non-linear equations, those in General Relativity (GR) in particular.
An extract:
Quote:
|
... but the thing that really keeps me up at night is this: Maybe all these thousands of physicists are simply using the wrong equations. I don’t mean that general relativity needs to be modified. I mean that we incorrectly use the equations of general relativity to begin with. The issue is this. General relativity relates the curvature of space and time to the sources of matter and energy. Put in a distribution of matter and energy at any one moment of time, and the equations tell you what space and time do in response, and how the matter must move according to this response. But general relativity is a non-linear theory. This means, loosely speaking, that ... |
Unfortunately, for some reasons or other, she has chosen to use Blogger as her platform, terrible choice! If you seriously want to help.
In later posts here, I'll introduce one genuine misunderstanding, and discuss it (and, in time, invite weristdas to join this thread): why is refraction ruled out as a viable explanation for "gravitational lensing"? Especially as refraction (or similar) MUST be happening.
Yes, at some high level it suffices to say that refraction is chromatic, gravitational lensing is achromatic, and what we observe is achromatic; case closed (with evidence, of course).
But ... stay tuned!
I wholeheartedly recommend BackReAction if you're looking for some serious foundations-of-physics discussions (including cosmology and parts of astropysics and astronomy), with the sometimes active participation of some heavy hitters. Having said that, some wax too philosophical for my taste, especially when it comes to QM.
via International Skeptics Forum https://ift.tt/2JjGVq2
Aucun commentaire:
Enregistrer un commentaire