Re: Proper quantities in SR


"Tom Roberts" <tjroberts137@xxxxxxxxxxxxx> wrote in message
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Pmb wrote:
"Tom Roberts" <tjroberts137@xxxxxxxxxxxxx> wrote in message
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Stephen Riley wrote:
[about "proper velocity"]
Perhaps it's the word 'proper' that is inappropriate here,
Yes, because that word is used with a quite different meaning everywhere
else.

In Jackson he uses the term "proper time" to refer to the value of the
integral of dt/gamma (Eq.. 11.26).

Right. That integral is the proper time of the object whose worldline is
being integrated over, with the integral performed in inertial
coordinates. This is the same usage of "proper" that I use.

There is nothing in there which suggests that the motion is inertial. In
fact Rindler is explicit in that he states that it implies to an
object/clock undergoing arbitrary motion.

Pete


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