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From: Volney <volney@invalid.invalid>
Newsgroups: sci.physics.relativity
Subject: Re: New annotated version of SRT
Date: Mon, 13 Mar 2023 10:31:01 -0400
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On 3/12/2023 4:36 PM, Thomas Heger wrote:
> Am 12.03.2023 um 17:46 schrieb JanPB:

>> No, we went through the full technical details on some
>> cases. Obviously we didn't do it for all the "annotations".
> 
> Sure. But in some cases I disagreed to your arguments.
> 
> E.g. I regard infinity as impossible as location for an emitter.

A classic (and recent) example where we point out one of your 
"annotations" as bogus, and why it's wrong. First, plane waves are used 
ALL THE TIME in physics, particularly optics. Second, Einstein already 
addressed your nonsense "complaint" by starting off § 7 as follows:

  "In the system K, very far from the origin of co-ordinates, let there 
be a source of electrodynamic waves, which in a part of space containing 
the origin of co-ordinates may be represented to a sufficient degree of 
approximation by the equations [plane wave equations]"


> But this approximation cannot be used in relativity, because also 
> velocities near the speed of light are considered, which would soon 
> cause the 'plane waves' to curve.

So "a sufficient degree of approximation" isn't sufficient enough. You 
are imagining the reader to be incorrectly following Einstein's 
instructions! Make it more sufficient!

> That definition was actually missing and the only relevant angle would 
> be that of the ray from the emitter to the spherical shell.

The emitter is irrelevant!
> 
> But that angle would actually be always 90°, hence l=1 and m and n zero.

The angle is to the frame K's x, y, z axes. So this time the mistake is 
yours.
> 
> Einstein forgot actually to write something about the angle, to which 
> these direction cosines belonged.
> 
> That is an additional error, too, because the reader is not requested to 
> guess, what the author had in mind.

No guessing required. The mistake is yours.

> So, yes, we discussed a few topics in some details, were I didn't agree 
> to what you have written.

Because you are either too stubborn (mental block) or don't understand 
the issue itself.

> Anyhow, I still regard my method as valid and do not see, what is wrong 
> with it.

In addition to ignoring our corrections, it's obvious you aren't 
sufficiently skilled with physics to try to make such "corrections".