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Demonstration that on Earth the speed of light cannot be isotropic

From Dino Bruniera <dino.bruniera@gmail.com>
Newsgroups sci.physics.relativity
Subject Demonstration that on Earth the speed of light cannot be isotropic
Date 2018-04-11 17:20 +0200
Organization Aioe.org NNTP Server
Message-ID <pal93n$1c42$1@gioia.aioe.org> (permalink)

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Demonstration that on Earth the speed of light cannot be isotropic.

The frequency of the photons of the CMBR measured on Earth, is not 
isotropic for some very slight anisotropies (around one in 100,000), but 
most of all for a particular anisotropy, called "dipole anisotropy", of 
much greater amplitude (around one in 1,000), which depends on the 
direction of the CMBR’s provenance and that is due to the motion of the 
Earth (about 370 km/s) with respect to a particular location in the 
space, in which this anisotropy would not be detected.
Hence in that location the CMBR’s frequency would be isotropic (without 
considering the aforementioned slight anisotropies) or, more precisely, 
would not be affected by the dipole anisotropy. But its speed would also 
result isotropic, since the MM experiment proved that the speed of 
photons (including those of the CMBR) results isotropic in any location 
in which it is measured.
Therefore, in this location both the speed and the frequency of the CMBR 
would be isotropic, as is realistically reasonable. Because it is not 
acceptable to assume that the frequency of the CMBR isn’t isotropic, and 
that, at the same time, its speed is isotropic (see the next section for 
a demonstration of this statement).
So if on Earth it appears that the frequency of CMBR isn’t isotropic 
(without considering the aforementioned slight anisotropies) and, on the 
other hand, that its speed is isotropic, one of the two measurements is 
not correct.
The location in which both the speed and frequency of the CMBR (without 
considering the aforementioned slight anisotropies) would be isotropic, 
can be only that where the frequency is measured, i.e., that where the 
Earth is transiting in the moment of measurement.
But if in that location the speed of the CMBR photons is isotropic, the 
speed of all the other photons, including light photons, must therefore 
be isotropic. And if the speed of the photons is isotropic with respect 
to the location they are traversing, it cannot be isotropic with respect 
to the Earth, as the Earth is in motion with respect to that location.
In conclusion, if on Earth the speed of the photons appears isotropic, 
as in the experiment of MM, it only means that the tools available on 
Earth are not able to measure it properly, and not that it really is 
isotropic.


Demonstration through thought experiments

Imagine the expanding Universe as a big rubber ball that is being 
continuously inflated, with many points marked on its surface 
(representing locations in space). Now imagine CMBR photons as a set of 
cars that move on its surface at the constant speed of 1 m/s.
Imagine then the Earth as a pickup truck that moves on the surface of 
the sphere, but at a lower speed than 1 m/s, and let us suppose that it 
is able to measure its speed against the cars. It would be revealed that 
the cars approach the truck at different speeds depending on the 
direction, and with suitable calculations it would be possible to 
determine its speed with respect to the point it is traversing.
For example, if the speed of only two of the cars coming from opposite 
directions was measured by the truck, and these were respectively 0.9 
and 1.1 m/s, the difference would be 0.2 m/s and its speed with respect 
to this point would be half, i.e., 0.1 m/s.
But if the truck measured a speed of 1 m/s for both of the cars (which 
would represent the MM experiment), it would mean that it does not have 
adequate tools to detect the exact speed and not that the cars are 
really moving towards it at a speed of 1 m/s, as this would be impossible.

Now, let us assume that in a certain point marked on the sphere, two 
lines of cars are passing through coming from opposite directions and 
with the cars in each line spaced 0.1 metre apart.
In one second an observer positioned at that point, would count 10 cars 
coming from one direction and 10 from the other, and would measure a 
speed of 1 m/s for each of them. Therefore both the frequency of the 
cars and their speed, would be isotropic.
Now, assuming that the truck always moves at a speed of 0.1 m/s in one 
of the two directions, in one second it would count 11 cars coming from 
the direction in which it is moving, and 9 cars coming from the opposite 
direction. So it would detect a difference of two cars between the two 
directions of origin (the difference represents the dipole anisotropy of 
CMBR). And if it accurately measured the speed of the cars with respect 
to itself, it would find that those coming from the forward direction 
would have a speed of 1.1 m/s, while those coming from behind would have 
a speed of 0.9 m/s.
Therefore, both the frequency and the speed of the cars, would be 
anisotropic.
But if it measured their speed isotropic (1 m/s) and their frequency 
anisotropic (11 and 9), it would mean that one of the two measurements 
was incorrect, namely that of the speed as shown in the previous 
experiment.

Dino Bruniera

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Thread

Demonstration that on Earth the speed of light cannot be isotropic Dino Bruniera <dino.bruniera@gmail.com> - 2018-04-11 17:20 +0200
  Re: Demonstration that on Earth the speed of light cannot be isotropic Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-11 15:09 -0500
    Re: Demonstration that on Earth the speed of light cannot be isotropic Dino Bruniera <dino.bruniera@gmail.com> - 2018-04-12 12:03 +0200
      Re: Demonstration that on Earth the speed of light cannot be isotropic Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-12 13:18 -0500
        Re: Demonstration that on Earth the speed of light cannot be isotropic mlwozniak@wp.pl - 2018-04-12 12:16 -0700
        Re: Demonstration that on Earth the speed of light cannot be isotropic Dino Bruniera <dino.bruniera@gmail.com> - 2018-04-13 17:08 +0200
          Re: Demonstration that on Earth the speed of light cannot be isotropic Tom Roberts <tjroberts137@sbcglobal.net> - 2018-04-13 18:08 -0500
            Re: Demonstration that on Earth the speed of light cannot be isotropic Dino Bruniera <dino.bruniera@gmail.com> - 2018-04-14 15:29 +0200
              Re: Demonstration that on Earth the speed of light cannot be isotropic Dino Bruniera <dino.bruniera@gmail.com> - 2018-04-14 18:54 +0200
              Re: Demonstration that on Earth the speed of light cannot be isotropic Dino Bruniera <dino.bruniera@gmail.com> - 2018-04-17 01:13 +0200

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