|MadSci Network: Physics|
Gravitational time dilation does not only slow down clocks, it slows down the passage through time of everything in the gravitational field - including you, so you would not see a clock to go slower if you were near it as your 'mental clock' would be going just as slowly. All this is described by Einstein's theory of General Relativity, an etremely difficult theory to grasp. If you would like to find out more about time dilation (and length changes, mass changes, and mass-energy equivalence, I suggest you research into Einstein's Special Relativity. The idea of relativity is to throw out the concept of us travelling through time inescapably, and accept time as just another dimension, so that moving through it is like moving forwards, left, or up. The catch, however, is that nothing can move faster than the speed of light, and that the speed of light appears constant (c=300000000metres/second) to all observers. From this, Einstein showed that time is dilated by the 'gamma factor' for an object moving at speed v, where gamma=sqrt(1/(1-(v/c)^2)).
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