Re: Redshift without expansion

On a sunny day (22 Jun 2006 10:09:54 -0700) it happened "sean"
<jaymoseley@xxxxxxxxxxx> wrote in
<1150996194.909220.244540@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>:

I was under the impression Maxwell used fluid analogy top get his equations.
I still cannot confuse myself enough to follow you reasoning in that example.
The EM wave *moves*, and you will see amplitude variations (as the duck sees),
the amount of bobbing of the duck is related to wave amplitude, the frequency
to wave frequency (for stationary ducks), when one moves you get a frequency
change.

Its nature.
But how does the EM wave move? I know it appears to move because we can
turn a light on and see it from 20 feet away.However it doesnt move in
the same way as the duck in water does. Because the duck and water
molecules transfer energy by physically bobbing up and down (and back
and forth ).

A very simple analogy (OK nobody even knows WHAT EM wave constitutes,
if there is some medium that makes it travel at some specific speed etc,
all theory) but this analogy:

Take a few meters rope.
Connect (tie) one end to some pole a meter from the ground.
Now walk back, with the other end in your hand.

Move it up and down with say 1 period per second.
You will see a wave travel vertically: vertical polarised wave.
Move it sideways at the same speed.
Now you see a horizontal polarised wave travel along the rope.
Move it left circular, now you see a left circular wave, and the same
for right circular 'polarisation'.
So here we went 3D.
It does not give 'the mechanism', but it shows how vertical slits (polariser)
can stop your rope from moving horizontally, etc..

Sometimes these things help to have a picture of what happens if you play
with that stuff, waveguides, polarisers.

Then there is the electric (charge) and magnetic aspect of an EM wave.
Simply stated, in case of a sine wave, where the electrical wave changes
fastest (and that is in the sine in the zero crossing, so 'zero'), the
magnetic field it generates (or is associated with) is the strongest.
So a 90 degrees phase shift exists between electric and magnetic field.

But at each point in space the EM wave isn't bobbing up and down nor
back and forth. And I've never heard a explanation from any theorist,
Maxwell or otherwise that offers an explanation how the energy
is transfered mechanically.

Well, some claim 'photon' light is a particle (Einstein got the Nobel
for that).
I prefer to look at it as a wave, but for that wave to have a speed 'c'
we sort of need a medium.....
[and] that would create a preferred reference frame.

So here fights exist in sci.physics and sci.physics.relativity:
LET (=Lorentz Ether Theory) versus relativity, BIG fights.

No fights here...


And if one cant say for sure *how* a wave propagates energy through
space
then one cannot rule out that a non expanding universe with a constant
c can allow the observed frequency to diminish with distance.

There is 'tired light' theory.

Because mathematically its allowed as I can show.

Well I cannot follow your example, because in your example 'some part
of the signal' disappears, I do not understand why that would be.

.

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