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Author Topic: Are there other reasons for the red shift?  (Read 1718 times)

Offline thedoc

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Are there other reasons for the red shift?
« on: 19/12/2015 15:50:02 »
Robert Jeffs asked the Naked Scientists:
   The currently fashionable idea is that the universe came into being in a vast explosion.  This is about as plausible as saying some god created it. What conceivable force could have dispersed such a vast amount of material against the attraction of gravity.  In view of this  why have other reasons for the red shift not been sought?  For example, perhaps light waves are attenuated in traversing vast distances and times.  This would also explain the increase of red shift with distance which is currently attributed to an acceleration of the rate of expansion.  But acceleration needs a force.  Where is it?
What do you think?
« Last Edit: 19/12/2015 15:50:02 by _system »


 

Offline puppypower

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Re: Are there other reasons for the red shift?
« Reply #1 on: 19/12/2015 17:00:48 »
Say you have a gas under pressure, such as the can of spray gas used to clean computer keyboards. As you release the pressure you will notice that the can gets colder and colder.

Say we use this can of gas to clean the computer keyboard, in the dark, and have someone watch the can in IR. What they will notice is a red shift, as the can gets colder. We can simulate this with an empty can in motion; Doppler shift. But due to the rapid temperature change, it would need to go really fast.



 

Offline Thebox

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Re: Are there other reasons for the red shift?
« Reply #2 on: 26/12/2015 19:51:53 »
Robert Jeffs asked the Naked Scientists:
What conceivable force could have dispersed such a vast amount of material against the attraction of gravity.  In view of this  why have other reasons for the red shift not been sought? 


My personal thoughts is that red shift is a similarity to motion blur, distance and light magnitude and angular displacement of line of sight creating  a visual  phase shift of the white light, I prefer the expression the Universal light is being stretched rather than the universe is expanding.   I do not think it is really expanding at all, I think the distance stars/galaxies are in an ''event horizon'', like an asteroid belt, and polarisation trying to force the stretch but gravity holding there positions.  Sort of a stretched elastic band, to its limit.


 

Offline evan_au

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Re: Are there other reasons for the red shift?
« Reply #3 on: 26/12/2015 21:51:27 »
Quote from: Robert Jeffs
perhaps light waves are attenuated in traversing vast distances and times?
This idea was suggested soon after Hubble detected the increasing redshift of distant galaxies.
This group of theories is called "tired light", as if the light loses energy with distance.
Some versions of this theory have been disproved.
See: http://en.wikipedia.org/wiki/Tired_light

Quote
What conceivable force could have dispersed such a vast amount of material against the attraction of gravity?
The current favorite is a hypothetical scalar field which exhibits different phases states. In this field, "a disturbance in the Force" is nicknamed the "inflaton".
« Last Edit: 26/12/2015 22:17:18 by evan_au »
 

Offline A Davis

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Re: Are there other reasons for the red shift?
« Reply #4 on: 28/12/2015 01:46:35 »
There is a force in science that can cause a big bang but nobody has thought of it, you would have to talk to me personally to know more what is a PHd worth.
 

Online chiralSPO

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Re: Are there other reasons for the red shift?
« Reply #5 on: 29/12/2015 04:52:17 »
Say you have a gas under pressure, such as the can of spray gas used to clean computer keyboards. As you release the pressure you will notice that the can gets colder and colder.

Say we use this can of gas to clean the computer keyboard, in the dark, and have someone watch the can in IR. What they will notice is a red shift, as the can gets colder. We can simulate this with an empty can in motion; Doppler shift. But due to the rapid temperature change, it would need to go really fast.

This isn't quite right. The spectrum emitted from the colder can is not the same as a warm one moving away quickly. The relative intensities of light at different frequencies changes as well as the overall shift of the λmax... We can tell how warm a blackbody is as well as what its relative velocity is, especially if one can find characteristic frequencies (such as elemental bright lines) to determine the extent of the redshift.
 

Offline lunar7

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Re: Are there other reasons for the red shift?
« Reply #6 on: 31/12/2015 13:46:07 »
If I can recall, there are two redshifts; the cosmological redshift is due to the Universe expanding between galaxies and the recessional redshift due to the individual galaxies moving due to say a local cluster.
 

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Re: Are there other reasons for the red shift?
« Reply #6 on: 31/12/2015 13:46:07 »

 

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