Does special relativity require faster than light information transfer to verify length contraction and time dilation?
How does the "outside observer" measure these variables? I guess the outside observer cannot exist within the universe and is "outside" the universe somehow observing. Also would the outside observer somehow need to have the objective definition of a meter and a second?
Also isn't the only way to record length and time, by light?
If you could refer me to experimental techniques and evidence that would be great!! Theory is everywhere but what would we be without the experimentalist!