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Old 04-21-2009   #22 (permalink)
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Re: What is "spacetime" really?

Quote:
Originally Posted by Boof-head View Post
How do clocks do that?
By ticking?

...but seriously:
Maybe I should have said clocks "reflect" reality.

Sure, clocks "measure" the advance of duration as we "tell them to" --as we construct them.

But if reality [the local, clock's reality] slows or otherwise changes, then the clock reflects that.
<this is referring to inside a spaceship, say--versus on the surface of Earth>
===

Atomic clocks run differently--relative to each other--because of differences in gravity or velocity, don't they? It is the atomic decay which is being affected, isn't it?

p.s. To be clear, that slowing of reality, for the clock, is only measurable relative to some other clock's reality. I'm not saying the clock "appears" to slow down to a present observer--but only relative to some distant "objective" reference.

Last edited by Essay; 04-21-2009 at 12:39 AM.. Reason: add p.s.
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