Recent content by Foppe Hoekstra

To all, I noticed that no one denies that the printing of the front clock should be ahead of the printing of the rear clock, except that it is hard to define the proper frame for it. I think it is agreed that it is valid in the co-moving frame of a similar single wagon, when we provide that the...

Consider the full-circle train (radius R) of a great number (n) of wagons, coupled by clocks that can print a dot on the rail. All clocks are synchronised when the train is at rest (in regard to the rail, being the Stationary Frame SF) and then the train is accelerated to a constant speed v...

Don't blame me for that! That is what the Relativity Theory requires.

Shouldn't Romer return to the same place he started his voyage? In the frame of Homer he made his space voyage plus a voyage from the front to the back of the train.

I thought it is clear that for both the rear and the front clock I chose the track frame (the junction).

By whom? ? From the moment the front clock reaches the junction between the straight track and the circle, the front clock is moving with speed v in a circle for the time that is necessary to round the circle and during that time the rear clock is also moving with the same speed and precisely...

This looks to me like circular reasoning. And the reason why I do not start at the rest frame is because the outcome of that is already clear to me. I just think it should agree with reasoning that starts at the moving frame. But strangely it doesn't.

As long as you write in clear language that is not more complicated then necessary (I am not a native speaker in English) you may be as confrontational as necessary.

But in the moving frame they are sync. Let's throw in an extra clock at the rear that is sync wtih the other clock at the rear. How is the rest frame to see the difference between the two sync rear clocks and the sync rear and front clock?

If two coinciding clocks, that have the same constant speed in the same direction, are sync in their co-moving frame, I should say that they are also sync in the observing rest frame. Isn't it?

First of all, I think we should be just as less interested in the rest frame (of the rail) as in any other frame, except when the dots are printed, that is the only moment the rest frame is relevant. At that moment the clocks on the moving train ‘communicate’ with the rest frame and it is only...

To all, After 27 years of computer programming experience I know: before you start any calculation, first get the conditions right. Note that before entering the circle all clocks are sync in the co-moving frame. During the entering of the circle all clocks remain to have the same amount of...

OK, I think we share some tracks now;-) But what if we have instructed every clock to put a dot on the rail at ‘noon’ (in every clock’s own frame). Sufficiently before noon the complete train is on the circle and it precisely fills the circle, so the rear clock of the last wagon coincides with...

The situation is a piece of straight rail feeding into a closed circle. Consider my definition of synchronized clocks in a circle: We have n clocks in a closed circle( so clock number zero is clock number n) Every sequential pair of clocks is at equal distance t0 = t1, t1 = t2, ..., tn-1 = tn...

Consider a wagon with length L and constant speed v on the straight part of a rail. The wagon has clocks on both ends that are sync in the co-moving frame (of the wagon and the clocks). Then there is a curve in the rail with radius r. The speed of the wagon in the curve is still constant v, but...