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Tech Head - The Technology Section
Einstein's Alcove
Does space ever end?
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<blockquote data-quote="JTA" data-source="post: 279840" data-attributes="member: 191063"><p>this is nonsense. As I (and spiney) have said before : nothing can travel faster than light.</p><p>It is true that the distance you can travel in a given "unit of time" grows larger if you increase your speed, but you will still be well inside the lightspeed-limit.</p><p>And another point on this "faster than light information exchange" : you might say that at the speed of light itself, the distance you can travel becomes infinite, so the information you carry with you comes available to any place in the universe instantly.</p><p>This is NOT true, because you're forgetting the basic rule of relativity : the time shift is relative to the moving object only :</p><p>- from your point of view, travelling at the speed of light, it took 0 seconds to get your information from A to B, no matter the distance between these 2 points in the universe.</p><p>- however, for any observer on point A and B, it took you the amount of time you'd expect from any object moving at light speed. If A and B were seperated by 10 lightyears, your information would need 10 years to travel from point A to point B.</p><p></p><p>So there is no such thing as the instant exchange of information.</p></blockquote><p></p>
[QUOTE="JTA, post: 279840, member: 191063"] this is nonsense. As I (and spiney) have said before : nothing can travel faster than light. It is true that the distance you can travel in a given "unit of time" grows larger if you increase your speed, but you will still be well inside the lightspeed-limit. And another point on this "faster than light information exchange" : you might say that at the speed of light itself, the distance you can travel becomes infinite, so the information you carry with you comes available to any place in the universe instantly. This is NOT true, because you're forgetting the basic rule of relativity : the time shift is relative to the moving object only : - from your point of view, travelling at the speed of light, it took 0 seconds to get your information from A to B, no matter the distance between these 2 points in the universe. - however, for any observer on point A and B, it took you the amount of time you'd expect from any object moving at light speed. If A and B were seperated by 10 lightyears, your information would need 10 years to travel from point A to point B. So there is no such thing as the instant exchange of information. [/QUOTE]
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Tech Head - The Technology Section
Einstein's Alcove
Does space ever end?
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