Re: Expansion is wrong and its soooo freakin' obvious

On May 15, 2:08 pm, jjs...@xxxxxxxxx wrote:
On May 15, 4:38 pm, Michael Helland <mobyd...@xxxxxxxxx> wrote:

On May 15, 1:31 pm, jjs...@xxxxxxxxx wrote:

<snip, trash>

Well, according to Sean Carroll, it's not conserved.

So if deceleration is in hot water for not conserving energy, so is
expansion:

"Actually, there is a field of physics in which energy is not
conserved: it's called general relativity. In an expanding universe,
as we have known for many decades, the total energy is not conserved.
Nothing fancy to do with dark energy -- the same thing is true for
ordinary radiation. Every photon loses energy by redshifting as the
universe expands, while the total number of photons remains conserved,
so the total energy decreases. An effect which has, of course, been
observed. "

http://preposterousuniverse.blogspot.com/2004/05/doubt-and-dissent-ar...

This is of course complete trash since conservation of energy is
supported by both SR and GR.

This does not save you Mike since he never states photons lose energy
nor does he make the argument.


He states:

"Every photon loses energy by redshifting as the universe expands"



Even if he did its an unpublished blog
post so who gives a ***...


As the guy who wrote the well known textbook on GR said, it is well
known that GR loses energy.

Do a basic Google search and you'll find it's discussed quite often:


<quote>
Question:
How does the expanding universe make a photon lose energy?
Answer:

By redshifting. A photon traveling through a spacetime described by
the Robertson-Walker metric is redshifted to lower energy. Where has
the lost energy gone? Perhaps since the metric represents a real
change in spacetime with time, it is not surprising that energy isn't
conserved, since energy conservation is a consequence of symmetry with
respect to translations in time.
</quote>
http://www.astro.virginia.edu/~jh8h/Foundations/Foundations_1/quest12.html


Energy is not conserved in the expanding Universe.

Nor is it in the decelerated light model.

They're remarkably identical.
.

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