Re: Cosmological redshift

[Bob Sciamanda <sciamanda@worldnet.att.net>]

David Bowman wrote:
> . . .  
> Recall the definition of the meter: (1/299792458) of the distance
> that light travels in 1 second.  The standard of length is tied to the
> defined factor c. As the universe expands the value of c, being defined as
> a particular constant, does not change.  Since c stays the same throughout
> the expansion process, the length of the meter (and thus the centimeter
> above) also remains constant.  
> . . .

What about the duration of a second?  Does it change? 
Since c is distance per time, it is not obvious which changes 
and which does not change (or do they both change) to keep c fixed.
Is it not space-time which expands, and not just space or time?
Please clarify.

> David Bowman
> dbowman@gtc.georgetown.ky.us

-- 
Bob Sciamanda				sciamanda@edinboro.edu
Dept of Physics				sciamanda@worldnet.att.net
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