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Old 17-03-2012, 11:07 PM   #76
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Join Date: Mar 2012
Location: Philadelphia
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This video is fun to watch.

In this video, they say that only light speed doesn't change regardless of relative motion.

However, time changes due to the relative motion.

Einstein, 100 years ago, already though that time is an illusion.

( It took me many years just to understand the easier version of interpretation of what he meant ! and my excuse is that it was before this youtube cartoons were available many years ago. )

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