- #36
Bartolomeo
- 134
- 13
We can think this way. When Herb passed by John, their clocks showed the same readings. Then, if Herb has another synchronized clock (of his reference frame) adjacent to Bob's clock, that Herb's - 2 clock shows different time than Bob's. But this method is equivalent to introducing Herb's rest frame. Then Bob approaches Herb from distant location. When they meet, Herb will make a conclusion, that Bob's clock dilated. However, If Bob will compare his time with time in Herb's reference frame, he will make a conclusion that time in Herb's reference frame accelerates.
The thing is that we change reference frames. John introduces his frame first and Herb moves in it. Herb dilates. Then Herb introduces his rest frame. John dilates. Bob is at rest and John is at rest either. If we will stay in one chosen frame, observations will not be reciprocal.
Observer "at proper rest" measures dilation. Observer "in proper motion" measures acceleration, since his own clock dilates in certain reference frame. Depending on "proper state" observations will be different.
If you are "at rest", you introduce your own frame. If you are "in motion", you don't introduce your own frame but use that you are "in motion" in.
The thing is that we change reference frames. John introduces his frame first and Herb moves in it. Herb dilates. Then Herb introduces his rest frame. John dilates. Bob is at rest and John is at rest either. If we will stay in one chosen frame, observations will not be reciprocal.
Observer "at proper rest" measures dilation. Observer "in proper motion" measures acceleration, since his own clock dilates in certain reference frame. Depending on "proper state" observations will be different.
If you are "at rest", you introduce your own frame. If you are "in motion", you don't introduce your own frame but use that you are "in motion" in.
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