In relativity, when it comes to calculating the beta factor, what frame of reference are we supposed to use to measure the speed of the object ?
Just there? .'c's the same in all inertial frames. Then you'd have to use the Lorentz transformations to work out it's new speed in a different reference frame.Originally posted by STAii
where did i go wrong ?)
Let's suppose that the object actually speeded up for 0.9c,