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From: Thomas Heger <ttt_heg@web.de>
Newsgroups: sci.physics.relativity
Subject: Re: the notion of relativity of simultaneity
Date: Sun, 13 Oct 2024 09:02:36 +0200
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Am Samstag000012, 12.10.2024 um 13:56 schrieb Richard Hachel:
> Le 12/10/2024 à 11:05, Mikko a écrit :
>>
>>> This is actually not true, because the world which SRT describes 
>>> isn't the world we live in.
>>
>> A failed attempt is still an attempt. Therefore your "because" is wrong.
>> SR is an attempt to describe the world. Later it was found out that the
>> world is different but that does not affect what SR is.
>>
>>> SRT is about a world, where all thinfgs drift around in a dark and 
>>> starless void,
>>
>> No, it is not. SR is about the geometry of the world, not about its 
>> matter
>> content except that the matter content must be compatible with the 
>> geometry.
> 
> SR is first and foremost an attempt to explain the Michelson-Morley 
> experiment.
> 
> The calculation shows that, according to the experiment, w=v+c=c
> 
> Which is absurd.

No, it's not absurd.

You need to think in terms of physical reality and ask yourself the 
question: why?

Or: Why doesn't the speed of light depend on the velocity of the source?

The reason must be: because speed of light isn't controlled by the 
source, but by the space inbetween source and receiver.

This is an obvious requirement, anyhow, because if you would give it up, 
than all sorts of strange effect could emerge, which we do not observe.

E.g.

if the space itself would not controll the speed of light, than light 
could have different velocities in the wastness of the universe.

Now, already a miniscule different velocity of light rays would add up 
to large discrepancies in the time of arival at a remote spote, where an 
observer would like to observe them.

Since everything moves in the universe, we would encounter 'blur' 
effects, if light would not always maintain the same speed, because we 
could see rays originating from the same spot at different times.

This would look, as if the e.g. star 'smeared out' and had a strange 
halo or similar, because the solar system moves and the entire galaxy 
rotates.

....


TH