ok i don't know how to use this forums equation pictures so i'll just add a picture of the equation. And I am not that good in this, I don't have education abour physics or math in this way. This equation is the relativity factor equation and equals the relative factor right? Anyway, I was wondering what the number "1" at the top of the bracket stood for? I have seen people replace it with for example 2(pi)r. what does it stand for, and what does it mean, and what does it mean when it is 1.