How Relativity and GPS make love to bring us the biggest clock ever [video]

We take for granted what it should be considered the magic of nowadays life: special and general relativity work to give us better GPS locations. You heard it. In order to track the exact position of an object you need to receive the signals from four of those 30 GPS satellites and then you will be able to “triangulate” your position. Remember, GPS satellites do not track you, they only send the signals.

These satellites carry atomic clocks and, since they apply so well corrections according to Einstein’s relativity they build up clock big as our entire Planet. Did you know that if you live on top of a sky-scrapper the time will pass a little faster when higher in the gravitational field? These and more can be found out from Minute Physics.

3 Responses to “How Relativity and GPS make love to bring us the biggest clock ever [video]”

  1. Except that the satellites DON’T track you. They know absolutely nothing about you. It is YOU who track the position of the satellites by comparing signals.

  2. You are right. The GPS is in fact a GPS receiver and it tracks the satelites. A long explanation here: http://electronics.howstuffworks.com/gadgets/travel/gps.htm . Thanks for the clarification Peter!

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  1. Time exists because of space - Minute Physics explains [video] | TehGeekTive - 14. Nov, 2011

    […] might want a detailed explanation of this phenomenon of time not being consistent in all systems by watching the explanation about GPS and time. Related Posts:How Relativity and GPS make love to bring us the biggest clock ever […]