From: nicolaas.vroom@pandora.be
Op woensdag 27 oktober 2021 om 09:16:18 UTC+2 schreef J. J. Lodder:
> Jos Bergervoet wrote:
>
> > He didn't imply that everything therefore has to be as we
> > currently think it is. So what would it prove here?
> There is nothing to prove, or that can be proven.
Unimportant.
> We seem to live in a universe that is ruled by law,
> rather than a lawless or a chaotic one.
We are part of world that is constantly changing.
This world can be divided into parts that behave more or less identical.
For example 'everywhere' in the univerese are galaxies. [2]
> Why this is the case is, as Einstein said, a complete mystery.
Why this is the case nobody knows. It is a 'fact' based on observations.
> > > That's easy. Our present theories say that we live in a spacetime
> > > in which space and time are the same thing. [1]
> > > [1] This follows from the fact that we can eliminate c completely
> > > from all laws of physics by means of a suitable choice of units.
[1] is in conflict with [2] above.
The problem with spacetime is that we define a line segment which
connects two events t1 and t2.
This line segment defines the start and end point of a light signal.
The problem is that line segment c*dt does not physical exist.
The main problem is an unambigous definition of the points x1,y1,z1,t1
and x2,y2,z2,t2 of the two events in space.
That means an event in our Galaxy and in Andromeda Galaxy.
That means you need a clear definition how these events are measured.
This problem would be simpler if one reference frame and one clock is used.
Spacetime is in fact a mathematical approach. To set c to 1 (and to make
it a physical constant) does not 'solve' the issues involved.
Nicolaas Vroom.
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