Re: Relativity as an axiomatic system

From: John Kennaugh (JKNG_at_kennaugh2435hex.freeserve.co.uk)
Date: 11/04/04 

Date: Thu, 4 Nov 2004 21:42:23 +0000

Bill Hobba writes

[....]

>> > The other paper said:
>> >
>> > 'Status of the invariance of the speed of light was reduced from a
>> > foundation of the Special Theory of Relativity to just a property which
>> > allows to determine a value of the physical constant.'
>>
>> And that simplistic proof-by-assertion is incorrect.
>
>The papers demonstrate otherwise.

No it doesn't it quotes a reference. That reference may or may not
demonstrate otherwise but I haven't seen it. Have you?

[...]

>> > And other researches showed this stuff about light is irrelevant.
>>
>> What researches, specifically, Billy?
>
>Those that developed the techniques detailed in the paper I referenced.

Which quoted another paper which I suspect you haven't read.

[...]

>> > > > Did you read it or is calculus beyond you?
>> > >
>> > > You obviously didn't.
>> >
>> > Yea right.
>>
>> Well, Billy, if you *had* read it, you could have outlined the rationale.

In no doubt condescending tones.
[...]

>> Bill, why don't you try to address the points at issue?
>
>The point at issue was the status of the second axiom.

>> Personally, I find a major flaw right at assumption #1. Which is actually
>> at least 3 separate assumptions.
>>
>> "1. Laws of physics are the same in all inertial coordinate systems.
>> (Einstein's relativity principle) This implies isotropy of space and
>> homogeneity of space and time. "
>>
>> Of course, the laws of physics being the same in all frames in no way
>> implies that space and time (in the Einsteinian sense) are homogenous.
>What
>> this means is that the author is assuming both Einstein's first and second
>> postulates. Why bother continuing another step? The rest is tautology.
>It
>> proves nothing.
>

>Consider an inertial frame containing a Cartesian coordinate system. Free
>particles move at constant velocity by definition (that is the usual
>definition - I do not like it but it is the one used in the papers). Shift
>the coordinate system - do free particles continue to move at constant
>velocity? - yep. Thus by the POR the same laws apply hence it is
>homogeneous.

Let me understand this. a 'free particle' is one which has the same
speed in all frames of reference by definition. Isn't that simply
renaming the photon and saying that the speed of light is the same in
all frames of reference independent of the velocity of the source?
Except that you are not actually saying it is a photon and when you
determine what speed it has surprise! Let me guess - it goes at the same
speed as light. 

-- 
John Kennaugh
to email convert the number from hex to decimal

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