Can a redshift arise from expanding space?

[michel123456]

Also here

 

http://www.counterbalance.org/cq-guth/howdo-frame.html

[Mordred]

And your point?

 

The wording comes from trying to correlate a positive energy density that gives a negative vacuum.

 

Here is the simple related FLRW metric for that term.

 

[latex]w=\frac{\rho}{p}[/latex]

 

The stress energy tender has a similar relation in its tensor matrix.

 

In other words it's describing negative vacuum as replulsive gravity

 

When you think of an influence such as dark energy in terms of a pressure influence it removes the mystery on how it's influence works.

 

We still don't know the cause but in terms of pressure its easily understood.

I've posted numerous posts stressing the importance of thermodynamics in the FLRW metric and EFE. If you really want a solid understanding of cosmology. Study the ideal/perfect fluid laws. It will also help understand nucleosynthesis.

Edited January 18, 2015 by Mordred

[michel123456]

And your point?

 

The wording comes from trying to correlate a positive energy density that gives a negative vacuum.

 

Here is the simple related FLRW metric for that term.

 

[latex]w=\frac{\rho}{p}[/latex]

 

The stress energy tender has a similar relation in its tensor matrix.

 

In other words it's describing negative vacuum as replulsive gravity

 

When you think of an influence such as dark energy in terms of a pressure influence it removes the mystery on how it's influence works.

 

We still don't know the cause but in terms of pressure its easily understood.

I've posted numerous posts stressing the importance of thermodynamics in the FLRW metric and EFE. If you really want a solid understanding of cosmology. Study the ideal/perfect fluid laws. It will also help understand nucleosynthesis.

Excuse me but I understand nothing.

I didn't know that attractive gravity was related to vacuum, not to tell to positive vacuum, and that negative vacuum was something that we had some evidence of and that this negative vacuum was related to repulsive gravity.

[Mordred]

Ah no problem thought ya did

The relationship is shown in the stress energy tensor

 

http://en.m.wikipedia.org/wiki/Stress%E2%80%93energy_tensor

 

http://www2.warwick.ac.uk/fac/sci/physics/current/teach/module_home/px436/notes/lecture6.pdf