Am 24.12.2011 17:47, schrieb Tom Roberts:
> On 12/24/11 12/24/11 8:04 AM, Thomas Heger wrote:
>> Am 20.12.2011 01:05, schrieb Tom Roberts:
..
>> So a train of two hundred meters length could shrink in length to one
>> millimetre
>> at near speed of light.
>
> No. It is not THE TRAIN that "shrinks", it is the RELATIONSHIP BETWEEN
> THE TRAIN AND THE MEASURING INSTRUMENT that changes, such that a reduced
> length is measured. For uniform motion at any speed, the train ITSELF is
> unchanged, and people aboard notice nothing different from when they
> were at rest. Note that both "motion" and "at rest" must be specified
> relative to some inertial coordinate system.
>
>
>> But only length shrinks, hence the train turns into a 'pancake', but
>> only in the
>> FoR with lateral movement parallel at almost c.
>> In its own FoR it doesn't change, hence doesn't move.
>
> This is basically correct, but poorly stated.
>
>
>> So the very word 'space' must be relative.
>
> Hmmm. In relativity, spacetime must be foliated into space and time, and
> the choice of foliation does indeed determine what space is -- so it is
> "relative" the the analyst's choice (but that is an unusual usage of the
> word). In essence, in SR such a foliation requires specifying an
> inertial set of coordinates.
In SRT we have a lateral movement of FoR, while I discuss FoRs in an
angle, where time-axis is a bit spacelike and vice versa. This is more
related to GR than to SRT.
I assume a certain kind of spacetime to be real. What you call foliation
I try to depict as moving sheets.
Imagine a light cone with timelike axis vertical. Than we have an
inverse, what is a sheet and called spacelike.
This sheet is multiplied by three, because in a light-cone one dimension
is missing.
The space we see is not spacelike, but our own past light cone. This
means, the stars and the universe are a picture, that we regard as
separated in space (the 'universe'). But this is a picture, that does
not match reality.
The real thing are these 'sheets', that could be modelled with complex
numbers. a point in that picture belongs to three of these sheet and
moving along its trajectory, the complex sheet are 'cut' into space and
time.
This is my concept. Sorry my English not as perfect as it could and my
terminology is certainly amateurish. But I think the idea has merits.
Long version here:
(
https://docs.google.com/present/view?id=dd8jz2tx_3gfzvqgd6 )
>
>> Since space is defined over light,
>
> I have no idea what that is supposed to mean. "Over" is not a valid
> relationship between space and light.
Sorry, That 'over' is a German phrase ('über') in direct translation.
Actually I mean that light is used to define, what space is. Distance in
the universe is defined with the time that light travels. The vacuum is
the space, where light passes through, empty space, if in a straight line.
>
>> We could turn this around and search for effects, where something comes
>> seemingly out of no-where.
>
> Again, your word salad is incomprehensible to me.
Well, I try again.
One puzzle in physics is the source of energy for radioactivity. If I
assume the opposite to a black whole and call that white hole and regard
an atom as 'micro-bang', this would allow energy streaming from kind of
'hidden space'.
>> Such effects exist and one is called beta-decay, another one is called
>> 'big-bang'.
>
> Beta decay is not at all "coming seemingly out of nowhere" -- a nucleus
> decays, and the resulting products have less mass than than the original
> nucleus, but nonzero kinetic energy in the rest frame of the original
> nucleus. A nucleus is not "nowhere".
Well, that's not the case. This is the problem of the energy source. The
seemingly correct answer is provided through the standard modell, while
I try to develop an alternative.
> The big bang is indeed "out of nowhere". yes, that is a puzzle....
>
Maybe 'nowhere' just means 'invisible', but that invisible space is
real, only hidden.
TH