On Thursday, July 23, 2020 at 5:41:42 AM UTC-6, Lawrence Crowell wrote: > > On Thursday, July 23, 2020 at 5:56:32 AM UTC-5 [email protected] wrote: > >> >> >> On Saturday, July 18, 2020 at 6:31:23 AM UTC-6, Alan Grayson wrote: >>> >>> >>> >>> On Saturday, July 18, 2020 at 6:18:28 AM UTC-6, Lawrence Crowell wrote: >>>> >>>> The tortoise coordinates is found from the Schwarzschild metric >>>> >>>> ds^2 = (1 - 2m/r)dt^2 - (1 - 2m/r)^{-1}dr^2 - r^2dΩ^2 >>>> >>>> where for a signal leaving a point near the black hole with ds = 0 >>>> (null path) and propagating radially out, dΩ = 0, we have dt = dr/(1 - >>>> 2m/r) which then leads to >>>> >>>> T = t - t0 - 2m ln|r - 2m|. >>>> >>>> That is the tortoise coordinate. Please look this up to read further. I >>>> can't spend beaucoup time going over this for weeks to come. >>>> >>>> LC >>>> >>> >>> You don't have to. We're done. But you should IMO address Brent's >>> objection, maybe on another thread. AG >>> >> >> When it comes to GR, you're a genius; no question about it. I wouldn't >> want to waste your valuable time. But consider this; the Schwartzschild >> metric applies to NON-ROTATING masses. Do you really think a massive >> contracting star which forms a BH will be non-rotating? Obviously, it will >> be RAPIDLY rotating, like an ice skater who contracts her arms. Brent also >> had some substantive questions about your model. But I see you prefer your >> illusions than to address his objections. AG >> > > The result is similar, but more complex. The same calculation can be done > for the Kerr solution. It is just a lot more complicated mathematically. > > LC >
If you say so. In any event, the idea that an objectively existing gravitational field outside a BH should depend on the choice of a particular coordinate system, seems a non-starter. AG > > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/b0b324a3-3529-4de8-8f57-873d0536b180o%40googlegroups.com.
