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nomadreid

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- The v and x in the factor (t-vx/c^2) in the Lorentz boost: if v is the speed and x is the distance, then it doesn't matter if the movement is away or towards or anything else, the boost will be the same, but if vx is the dot product of velocity and a spatial position vector, then the direction makes a difference So which is it?

The Wikipedia article on Lorentz transformations is a bit confusing by its using speed and velocity almost interchangeably: of course γ (Gamma) stays the same, but (letting c=1) t'=γ(t-vx) , then if this is

**v⋅x**, and**x**stays the same, then there would be a difference if something were going away from the other at**v**or going towards each other at**-**I seem to recall that there is no difference, indicating that the scalars are what is meant, but in the Wiki article, there is a section in which they are, so I am obviously overlooking something.**v**.