- #1
Marilyn67
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- The entrainment of frames of reference in the ergosphere of a Kerr black hole (Lense-Thirring effect) and the speed of light ?
I have a problem understanding what is going on in the region called the ergosphere of a "fast" Kerr black hole.
- Relativity teaches us that no frame of reference can have relative displacements greater than the speed of light, ok.
- The ergosphere of a fast Kerr black hole can contain light rays and even relativistic particles.
From the perspective of a distant observer, isn't there a problem with relative displacement greater than the speed of light ?
(here the speed composition does not apply, right ?)
Can we talk about time loops ?
I've never heard of it in this case, but why ?
What difference is there with the famous cylinder of Tipler (hypothetical, of infinite length, ok..) which authorizes the trip on the past ?
Thank you in advance for your answers !
Cordially,
Marilyn
- Relativity teaches us that no frame of reference can have relative displacements greater than the speed of light, ok.
- The ergosphere of a fast Kerr black hole can contain light rays and even relativistic particles.
From the perspective of a distant observer, isn't there a problem with relative displacement greater than the speed of light ?
(here the speed composition does not apply, right ?)
Can we talk about time loops ?
I've never heard of it in this case, but why ?
What difference is there with the famous cylinder of Tipler (hypothetical, of infinite length, ok..) which authorizes the trip on the past ?
Thank you in advance for your answers !
Cordially,
Marilyn