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Suppose to be in an arbitrary gravitational field and you are moving in it arbitrarily with a clock in your hand. In this general situation I ask: if I read the positions of the hands of the clock, what am I really measuring the proper time or a simple coordinate?

Qmechanic
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Yildiz
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1 Answers1

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You are reading the proper time (which is, of course, the value of one of many possible coordinates).