Wednesday, April 25, 2018

Echoes of gravitational waves are evidence for optical gravity?


Sabine Hossenfelder's blog post mentions an interesting result from LIGO:

https://arxiv.org/abs/1612.00266

Gravitational waves seem to bounce off from the horizon of a black hole.

Our blog post on April 20, 2018 introduced the optical gravity hypothesis:


The hypothesis implies that the forming horizon is a perfect mirror for all fields - it has an infinite optical density for all fields. That could explain why gravitational waves bounce back.

But is the reflection of gravitational waves from the horizon actually predicted by standard general relativity?

UPDATE: Yes, it is! See the post:

http://meta-phys-thoughts.blogspot.fi/2018/04/the-horizon-is-perfect-mirror-also-in.html?m=1

Actually, optical gravity is not a new theory of gravitation - it is a new interpretation of classical general relativity. Therefore, all consequences of optical gravity can also be derived in classical general relativity.

Optical gravity does clarify some vague aspects of general relativity: optical gravity claims that the information in the Newton force propagates at the global speed of light while the Einstein equation leaves the speed vague. Also, optical gravity describes the structure of a forming black hole, while there are various views of what Einstein equation says.

Optical gravity may be amenable to quantization while the Einstein equation has presented insurmountable problems.

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