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RE: Speed of light not constant = young universe
June 22, 2014 at 12:39 pm
It would get really out of hand if you started applying a higher value for c to the cool regions in the CMB data. The size of these is regular and determined by c in the very early universe. If c was higher then the Universe is actually vastly larger than the current calculations determine and the universe would actually be older than a constant value of c implies.
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RE: Speed of light not constant = young universe
June 22, 2014 at 11:05 pm
I certainly hope that "c" doesn't change in the near future.
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RE: Speed of light not constant = young universe
June 22, 2014 at 11:33 pm
(This post was last modified: June 22, 2014 at 11:34 pm by The Grand Nudger.)
(June 21, 2014 at 7:21 pm)Heywood Wrote: Its an assumption that we use because it makes it easier for us to model the world.....but the truth is...it doesn't have to be that way. Unless you believe in God, there is no reason to believe the world just happens to be set up in a way that is convenient for us to come to an understanding of it. It might also be useful to mention that a constant speed was predicted, then observed - and is now utilized by all our fun little hightech toys.
Regardless of whether or not one believes in god there is every reason to conclude that the world around us "just happens to be set up in a way that is convenient for us to come to an understanding of it". All that one requires is the equipment we already possess - no matter who or what the designer and manufacturer of that equipment may be. Invoking god here is worse than wrong, it's useless.
The constant speed of light -has- "put up or shut up". So, unless you plan on yanking a living, breathing god out of your back pocket in the next few seconds..... 
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RE: Speed of light not constant = young universe
June 23, 2014 at 12:54 am
If you've never seen the stars in a time lapsed video this one is very good. http://en.actu.net/redirect.php?url=http...Night-Sky/
If the speed of light varied then wouldn't the images seem to be disjointed?
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RE: Speed of light not constant = young universe
July 5, 2014 at 2:58 pm
A claim such as this by this christian is absolute nonsense. Coming from the Christian faith to atheism through my study of astrophysics, I will do my best of defend the evolution aspect of this argument.
the speed of light (186,000m/s) is what in physics is called the cosmic speed limit or the universal constant. Without its constant unchaining measure our formulas in physics that help derive our understanding of the universe would not work. Such as Einstine's famous E=MC2 formula, which state that Energy is equal to the mass of an object times the speed of light squared. it is this formula that helped up to understand how the stars could generate so much energy in their cores through the process of nuclear fusion. To assert that the speed of light changes in nothing short of a dilution preached by this particular faith to aid in their argument that the Earth is young. When in reality if the speed of light actually did change, life on Earth would not exist.
it is theorized that substances in the universe may even travel faster than the speed of light, thus the reason that we cannot detect them. Dark Matter for example, is an undetectable matter, that is theorized to exist due to the mathematic equations calculating more mass in the universe than can be detected. It does not mean that it does not exist, it could mean that because it could travel faster than the speed of light is postulated to be the reason that it is a mystery. Had this matter traveled slower than the speed of light, the universe that we know it could not exist because this mysterious matter could very well be in addition to gravity what hold the galaxies together.
I heard many of these arguments while I was a christian. only when i started my degree program in astrophysics did I really understand how unintelligent and for that matter how undependable this position is. As the science of astronomy advance and can be proved without argument much like helocentrism in the past, only then will this logical absurdity cease among the devout religious. when their God is seen as less and less powerful, only then can they really see how stupid this argument is.
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RE: Speed of light not constant = young universe
July 5, 2014 at 3:31 pm
Yes I've heard the argument 'god changes time by speeding it up or slowing it down, that's why evolution seems true but we are only 6000 years old'. It's pretty much as annoying as 'god made himself impossible to be proven real to test your faith'.
What the hell is non standard science?
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RE: Speed of light not constant = young universe
July 5, 2014 at 3:39 pm
(This post was last modified: July 5, 2014 at 3:42 pm by Anomalocaris.)
Substantial changes to speed of light through history of the universe can only be embraced if one arbitrarily asserts other physical constants of the universe happen to also change precisely in such a way as to largely cancel out the effects of changes in C. This is because studies have concluded speed of light can not have changed independently of other physical constants by more than 1 part in a hundred thousand since the formation of earth, otherwise discernible geophysical and astrophysical evidence of the change would be detected by now.
A change of 1 part in a hundred thousand in light speed over 4.6 billion years will change estimate of age of universe by only a hundred thousand years or so out of 13 billion years, a deviation that would be totally lost in other measurement errors.
Those hypothesis which seriously suggests varying speed of light over the history of universe seem to suggest any major changes to speed of light only happened within first fraction of second of universe's existence, during inflationary era. No one seem to suggest anything like the sort of subsequent major change that would broadly invalidate measurements of the age of universe.
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