Unformatted text preview: after travelling more than 100 kilometers! Because they are moving close to the speed of light, the muons' internal clocks are running much slower than stationary muons. But in their own reference frame, the fastmoving muons's clocks run forward ``normally'' and the muons live only a couple of millionths of a second. Time and space are relative to the motion of an observer and they are not independent of each other. Time and space are connected to make fourdimensional spacetime (three dimensions for space and one dimension for time). This is not that strangewe often define distances by the time it takes light to travel between two points. For example, one light year is the distance light will travel in a year. To talk about an event, you will usually tell where (in space) and when (in time) it happened. The event happened in spacetime....
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 Fall '10
 EmilyHoward
 Astronomy, Space, General Relativity, Special Relativity, Speed of light, Spacetime, fastmoving muon particles

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