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?Is this difference in time real

المؤلف:  Simon Singh

المصدر:  Big Bang

الجزء والصفحة:  p-100

2026-09-07

18

 Yes, it is very real. There are numerous pieces of sophisticated hi-tech gadgetry that have to take into account time dilation in order to work properly. The Global Positioning System (GPS), which relies on satellites to pinpoint locations for devices such as car navigation systems, can function accurately only because it takes into account the effects of special relativity. These effects are significant because the GPS satellites travel at very high speeds and they make use of high-precision timings.