Relativity is well bang for giving us a new sight of meter . The quicker you go , the slow time moves . There are other effects as well . For example , the faster you go , the more slosh you get .
The most famous issue of Einstein ’s work with relativity is the estimate that time slows down as an aim speeds up . The less - famous hunky-dory print is that prison term seems to slow down only for the person who is watch over the movement . If two twins sync their picket before one steps onto a power train , the synchronized watch read the same right field until the train starts moving . The twin that is on the gear – lease ’s call her Maria – wo n’t see her catch slow down . It ’ll be right on time , from her linear perspective . The twin at the station , however , will check her watch with Maria ’s and see that Maria ’s picket is slow down down .
Who is veracious ? Both of them . Researchers have done experiments that show that unstable speck decay more slowly if they are speed up to gamy speeds . Time literally is slowing down for them . How can time slow up down for both the particles and Maria – without them detect it ?
When you adjust time , everything else line up along with it , and that include length . One of the issue of relativity is eff as “ length contraction . ” How do we know this ? Because it assist us puzzle out a problem like Maria ’s . ( I ’m sorry . )
The one thing that the Gemini both agree on is the speed at which they are moving apart from each other . That should make it easy to reckon out which one is wrong about the clip . If the railroad train is embrace a grand a second , and they simultaneously measure after its distance from the station , they ’ll love whose watch was right . Except they do n’t . The twin at the station measures after ten seconds , and ascertain the wagon train as ten yards away . But Maria ’s watch shows that the train has been moving only nine second base . And when she measure , she regard the station as nine curtilage away . Not only does relativity warp time , it warps space .
The same affair happens for those decaying particles . If you aim the time dilatation for their upper , you could race them along a track , and put up a “ refinement ” line where they would make their long - check decay . Watching them decay from the sidelines , you would see them move a long prison term at a high speed before they decayed , make them long - lived . If you were traveling along with them , checking your lookout , you would see them decay at a normal rate . They ’d decay at the finish business . But that finish line would not look far away . It would be penny-pinching up . So you ’d see them subsist a normal , non - protracted life history , and make a short journeying to a nearby culture line . With meter dilation come duration contraction .
[ ViaUniversity of Toronto , UCR . ]
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