[Graybeard]

Originally Posted by Einstein

In this scenario communication between the relative observers is based on information only traveling back and forth between observers at the speed of light. At 100,000 miles per second of relative velocity between observers each of the clocks appears to be running slower. In other words each observer sees the other observers clock as running slower. But no account is taken for the actual slowing down of time that does occur to the observer traveling at the high velocity.

Einstein ..... its not that the observations are restricted by the speed of light. The observation of course, is impossible. It is taken as a given, a thought experiment, that the observations can be taken, an 'imagine if'. The mechanics of the observation are not being considered here.

Spacetime alters in its 'ratio' between observers. Neither observer is privileged over the other. The two observers are in different 'ratios' of spacetime while acceleration exists between them. I don't really like the word ratio.

cool bananas ... greg