On 25 January 2014 16:31, meekerdb <[email protected]> wrote: > On 1/24/2014 4:41 PM, Edgar L. Owen wrote: > >> Brent, >> >> No, my proposed dark matter effect has nothing to do with black holes. >> Black holes are caused by accumulations of actual visible matter, not by >> the Hubble expansion of space... >> >> However I do have a question for you. Since gravitational changes >> propagate at the speed of light how does the mass inside a black hole >> produce gravitational effects outside the black hole? If light can't come >> out how can gravitational effects come out? >> > > You are thinking of gravity as mediated by force particles, like photons > mediate the EM forces. But (at least classically) gravity isn't a force, > it's just a shape of space and as I responded to Liz, there's not mass in a > black hole, no T_u_v term in the Einstein equation. It's a vacuum > solution. That's why it doesn't make any different what falls in to create > the black hole. The effects outside the event horizon are just that the > space is warped there just *as if* the black hole were a massive object. > > I believe Richard Feynmann was asked the same question (about how gravity "escapes" a black hole). Of course gravity WAVES can't escape a black hole...
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