Time Dilation is a fundamental concept in the theory of relativity, encompassing both special and general relativity. It describes the phenomenon where time appears to pass differently for observers in relative motion or under the influence of strong gravitational fields. However, the observable effects of time dilation can vary depending on specific conditions and factors. I would like to know about the extent to which time dilation can be observed and measured in practical situations, and what methods are used to detect its presence.
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3$\begingroup$ Wikipedia: Experimental testing of time dilation $\endgroup$– GhosterCommented Jul 15, 2023 at 17:10
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Satellites of the GPS network need to take into account time dilation, to correctly predict the time that passed, and the position of objects on the surface.
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2$\begingroup$ There is not a general rule of when it should be taken in consideration. You calculate the time dilation and compare it to the interval of your event to see if it makes sense to consider such phenomenon $\endgroup$ Commented Jul 15, 2023 at 12:21
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1$\begingroup$ Thanks for answering @LolloBoldo but what I mean is that time dilation requires another reference for us to even say that it has taken place. But to what extent is it possible so that it is even considered. Wouldn't that also make time obsolete? $\endgroup$ Commented Jul 15, 2023 at 12:29
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2$\begingroup$ You become much more aware of time dilation once you understand that it is the cause of gravity. Every time you drop your fork on your table, you realize that the only reason it fell is because time runs a little slower at the table than it does a few inches above. Your consciousness of time dilation increases dramatically when you start to think of it as something that affects your life every single minute. $\endgroup$ Commented Jul 15, 2023 at 12:56
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$\begingroup$ Thank you @foolishmuse. I think I get it now. Gravity should be set as a standard for measuring the difference which also lets you know of you state. $\endgroup$ Commented Jul 15, 2023 at 15:00
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1$\begingroup$ No @foolishmuse, you always need 2 frames by definition. Given an event, time dilation is defined as the ratio $\tau_1 / \tau_2$ where the two $\tau$ are the durations of such event in the two reference frames. If you remove one of them then it has no meaning $\endgroup$ Commented Jul 16, 2023 at 12:25