"We need to use the only thing that is constant in relativity, light." you mean the speed of light ? Can you define light ? I am surprise than physicists stick to the speed of something as fuzzy as light for a reference.
http://spaceandmotion.com/
"We need to use the only thing that is constant in relativity, light." you mean the speed of light ? Can you define light ? I am surprise than physicists stick to the speed of something as fuzzy as light for a reference.
http://spaceandmotion.com/
the speed of light is the speed limit of any form of matter. As in the speed of light I could more broadly define it as the speed any object with zero mass travels relative to anything else that is not of zero mass
(light is just the easiest particle to observe that has zero mass)