Re: EP and Unruh - effect (Layman)

Hello,

Uncle Al wrote:
> we_pretty@xxxxxxxxx wrote:
> >
> > Hello,
> >
> > (To Moderator: I posted question about this to sci.physics.
> >
> > http://groups-beta.google.com/group/sci.physics/browse_frm/thread/3daa3215f10e2ae5/0e7162941cbb64c6?hl=en#0e7162941cbb64c6
> >
> > There seems to be some controversy about some assumptions. I will
> > put my question as a sequence of claims such that if one is invalid
> > then the rest are probably too but they are really questions and not
> > outrageous claims but are wildy speculative)
> >
> > 1. Equivalence principle (ep) holds. If a small body is accelerated
> > in vacuum it gets Unruh - radiation. Because ep it gets Unruh -
> > radiated also when on a surface of planet (gr-qc/9303025 says no,
> > some people say yes)
> >
> > 2. Because of the radiation the body gets warmer if it is
> > sufficiently cold and starts to radiate.
> [snip]
>
> If the observer is local to the accelerating body there is no relative
> acceleration and no local observation of Unruh radiation.

Now I think I understand what you mean here. Unruh - effect is
about how the vacuum appears for a body in accelerating frame,
thermal bath said some website. Think about a sealed cube of
size epsilon with matter. The vacuum in the cube is hotter
when the cube is accelerated and the matter will get warmer.
This really is local effect. When the cube absorbs
photons from the "vacuum" they do no come outside of the
cube and are observed right in the cube. What happens outside
of the cube does not affect the photons. So because ep,
that happens to a cube on a planet on a gravitationally
accelerating frame.

[snip]

> Even if it did, calculate the Unruh-radiated power from a 1-gee
> acceleration - or a million gees, for that matter.

I cannot but I know that it is not much but I know that macroscopic
black holes are also very cool.

I'm not still at all convinced that planets don't evaporate.
(I have now searched nearly the whole web, the thread is also about
this:
http://groups-beta.google.com/group/sci.physics/browse_frm/thread/3daa3215f10e2ae5/0e7162941cbb64c6?hl=en#0e7162941cbb64c6
)


Thank You,

We Pretty

.

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