ATDTDA (5.1) - The Etienne-Louis Malus

[Monte Davis]

ya Sam:

> But that would be a very long instant if we're talking about millions 
> of light years, right?

In a reference frame moving at the speed of light in a vacuum, the 
entire history of the universe is instantaneous. One instant.There is no 
time.

Now, you can tap-dance around that by observing that no "thing" -- let 
alone any sentient observer -- is moving or can move at that speed.  A 
photon (and substitute "an electromagnetic wavefront" for "photon" at 
all times) has no mass at -- is undefined at -- any lesser velocity. But 
light itself does not know time.