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From: hitlong@yahoo.com (gharnagel)
Newsgroups: sci.physics.relativity
Subject: Re: Relativistic aberration
Date: Mon, 15 Jul 2024 02:52:54 +0000
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On Sun, 14 Jul 2024 22:30:07 +0000, Richard Hachel wrote:
>
> Beauty is the splendor of truth.
>
> If a theory is not beautiful, it is not true.

Socrates: the good, the beautiful and the true.

> We are therefore going to talk about a sensitive subject, the notion of
> relativistic aberration.
>
> A cube is placed in front of an observer, the yellow front side of which
> is the only one visible.
>
> <http://news2.nemoweb.net/jntp?QsysQnpetTSlB_zDsjAhnCKqnbg@jntp/Data.Media:1>
>
> This face is 60 meters away, and point M of the cube, relative to this
> observer, is exactly 60 meters away.
>
> Another observer placed in R', with relative speed Vo=0.8c in the x'ox
> direction, crosses the first observer at the same place, at the same
> time.
>
> For the moment, we are not looking for anything too complicated, namely
> what will become of the entire cube.
>
> No.
>
> We breathe, we breathe, we go very slowly so as not to fall into a
> number of hidden traps or false concepts.
>
> We just ask, to start...
>
> Where will the point M' in R' corresponding to M in R be located?
>
> Note that in Hachel, two joint observers have strictly the same vision
> of the universe (but with an aberration in x). Everything that is seen
> by
> one is seen at the same moment by the other; everything that is seen is
> seen
> by the other and vice versa; nothing that is not seen by one can be seen
> by the other, and vice versa.
>
> This is very important to understand.
>
> A contradictor who already comes to doubt, would show that he already
> completely misunderstands SR as it should be taught.
>
> R.H.

Dr. Hachel isn't being honest here.  The two observers do NOT have the
same
"vision" of the universe.  The cube with NOT be 60 meters away for the
moving
observer because of length contraction:  D will only be 36 meters, and
as for
"vision," the observer will see the cube >36 meters away because of the
finite
speed of light.  I feel no need nor desire to work this out, let alone
do the
off-axis calculations because I have better things to do with my time. 
I
worked out relativistic aberration calculations a long time ago to my
satisfaction.
Dr. Hachel should study the simpler relativistic situations, which he
has shown
that he does not understand.