On Mon, Apr 11, 2022 at 3:58 PM smitra <smi...@zonnet.nl> wrote: > On 10-04-2022 06:15, Bruce Kellett wrote: > > > Not relevant, since there is no enclosing reflecting boundary. > > Yes there is.
Where is it then? One can also consider an observation inside the event > horizon of a supermassive black hole. No photons escape from there. We are not currently inside a supermassive black hole. Besides, you knowledge of BH physics seems somewhat faulty. Inside the horizon, all particles move towards the singularity at r = 0 (because that is the forward direction of time). So there is no reflection off the inside of the horizon. That is a fanciful (and wrong) idea. > The escaping Hawking radiation is so small that it doesn't contain much > information. > > And since you are attempting to promote a FAPP argument to an in > principle argument, you also have to consider that the space environment > is not a perfect vacuum, so photons do not travel at exactly the speed > of light. This means that in principle one can retrieve the escaping > photons > I don;t think the difference between c, the speed of light in a vacuum, and the speed of light in outer space is a relevant consideration -- you still are not going to catch and reverse those IR photons. Bruce > -- > 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 everything-list+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/everything-list/6b721dd4c6cc8a999f2ada79919621d7%40zonnet.nl > . > -- 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 everything-list+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/everything-list/CAFxXSLQ8Qyc85-pwLCgkjciaZsKmnJxDcC1n4uTf04g_cu_BSQ%40mail.gmail.com.
