RE: The universe appears "old", but it is still less than 10,000 years old
February 19, 2014 at 7:36 am
(February 19, 2014 at 6:20 am)Zen Badger Wrote:(February 18, 2014 at 9:54 am)Alex K Wrote: I think I disagree. How do you measure the time it takes light to travel from A to B, and how do you define the time interval delta T which it took? You will implicitly use the "isotropic" synchronization convention to do it. The point is not that this is a deep physical difference, it's just that light travel times for one-way trips are a convention dependent quantity.
But that's not my point.
Regardless of what convention you might wish to use.
Independent of any measurement, it still takes light time to traverse distance.
It is never instantaneous.
No, I really hate to be the devil's advocate here when it means that I am on the side of Statler, but you are simply repeating the assertion. How do you know that it takes light time to traverse a distance?