08-23-2010, 02:05 PM | #61 | |
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1. The speed of their travel would cause a small amount of time dilation, which would result in time passing a little more slowly for them than for people back on Earth. 2. They spent time in a slightly weaker gravitational field than people back on Earth did. This would result in time passing a little more quickly than it did back on Earth. Of these, the time dilation effect would be by far the greater (although still very, very small). |
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08-23-2010, 02:08 PM | #62 |
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08-23-2010, 02:11 PM | #63 | ||
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08-23-2010, 02:16 PM | #64 |
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Certainly; it's been measured. A few years ago someone took two atomic clocks and precisely synchronised them. One of them then "stayed at home", while the other was flown around the world in commercial airliners. When it came back, the clock that had been on its travels was a few nanoseconds behind the one that had stayed in the laboratory, even though they were still measuring time at precisely the same rate. The amount of time lost by the travelling clock was precisely in according with what relativity predicted.
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08-23-2010, 04:19 PM | #65 | |
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08-24-2010, 01:09 AM | #66 | |
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Consequently, if you and your twin have to share a bunk bed, take the lower one; you'll age slower. Okay, well, it probably take a million years to equal a couple of seconds. |
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08-24-2010, 03:54 AM | #67 |
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Speed of light is what WE calculated it should be.. What if our sense of 'time' is not correct?
I sometimes dream a whole story/book/movie in 4 seconds flat.. How can I do this? How can I fit all that information into those few seconds? |
08-24-2010, 04:00 AM | #68 |
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08-24-2010, 04:42 AM | #69 |
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Yup HarryT is right:
http://www.xs4all.nl/~johanw/PhysFAQ...measure_c.html List of the experiments of how speed of light was deduced |
08-24-2010, 08:27 AM | #70 | |
Bah, humbug!
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Last edited by WT Sharpe; 08-24-2010 at 08:35 AM. |
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08-25-2010, 05:04 AM | #71 |
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This is something I have been annoying people with for years now. Usually they seem to mean that moving something 'back' makes it 'later', but when I change my watch to move it 'back' it is to an earlier time. When I point this out they just call me a now-it-all (or worse) and I have no friends.
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08-25-2010, 09:26 PM | #72 |
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In response to those who chimed in on the idea of an existence with no time at all, I have what I think is an interesting question; Inside a wormhole, wouldn't time (at least as we understand it) cease to exist?
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08-25-2010, 09:49 PM | #73 |
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Have you ever read the long out of copyrite work "Flatland"? Skipping the bits about war, the societies in it ..... and how the 1-dimensioner's view 2-dimensioners, etc .... gives a very good feeling why someone *IN* an N-dimensional universe (i.e. our 4 dimensions including time) cannot even conceive of a larger dimension. They don't have words to describe it, and can't wrap their heads around the idea of more dimensions than they know.
I find it useful for thinking of time as one of those "we can't even imagine it" dimensions -- i.e. a 5-dimensional being *can* move backwards in time, whereas we cannot. Actually, we can imagine it .... so that's a little different than the dimensions discussed, wherein one's brain can't even grasp a higher dimension than it is built in. But the book stretches the mind as regards to the more usual of our 3 dimensions. Very interesting read! |
08-25-2010, 09:56 PM | #74 |
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I am definately going to check that book out. Thank you!
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08-25-2010, 10:05 PM | #75 |
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It's available here at MR -- see the book section.
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sci-fi, time |
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