Hi Marsha
It probably depends on what you mean by a vacuum but I was having an
interesting conversation with a friend of mine yesterday about C.
Apparently, from what I gather he was talking about, C is no longer a
constant but is dependent upon the curvature of space - i.e. if there is
a gravitational difference in one area of the universe compared to
another area (E.g. a singularity) then there will be a difference in the
value of C! The greater the effect of gravity the slower C becomes and
thus time is affected. So in areas of high gravitation time is slower
than in areas of lower gravitation. Weird? Maybe. The Standard Model has
been in a bit of a mess recently and I don't suppose that this helps too
much.
This also, apparently, has implications for the age of the universe as
in the early stages of the universe overall gravity would have been much
greater so time would have been slower which means, I think, that the
universe could be older than has been assumed!!!!! It could also mean
that as the universe expands and average gravity value decreases time
speeds up. Which may also be a factor in the apparent increase in the
speed of expansion of the universe. Maybe! All pretty mind-blowing but
very interesting.
I'm sure this idea has been around for a while but I can't find specific
references to it at the moment but I think there was an article recently
in either New Scientist or Scientific American relating to some new
ideas on the subject and how it relates to a reduction in the amount of
dark energy/matter required to make various sums add up properly. Anyone
else heard anything about this? Or am I becoming delusional as I get
older? Which is entirely possible!
Horse
On 02/09/2010 07:58, MarshaV wrote:
Greetings,
It is my understanding that the usefulness of c is dependent
on it existing within a vacuum, a vacuum which does not
exist, is this true? Anybody know?
Marsha
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