British physics whizz Professor Brian Cox has gone on the platter to say thattime travelispossible . regrettably , there ’s a Brobdingnagian caveat to his claim : if you were able to achieve this feat , you ’d only be able to travel into the time to come never to regress . Why ? Traveling into the past is impossible . Possibly .
The idea of single-channel - directing time locomotion is a slap in the face for most science fiction storylines , but fortuitously for Marty McFlythere ’s no risk of accidentally log Z’s with his mother from 1955 in this scenario . However , zooming around on loom skateboards in the future is completely plausible . Maybe .
Cox place out this little trick of physics at a manner of speaking at the British Science Festival while discussing the merits of Doctor Who’sTARDIS , but it probably is n’t word to anyone with a canonic knowledge of how Einstein ’s theory of Special Relativity work out . Although theUK internal pressseems to think otherwise . ( picture : Jay Williams )
https://gizmodo.com/our-universe-may-contain-tardis-like-regions-of-spaceti-1292708025
“ Can you build a time motorcar ? ” said Cox . “ The answer is yes . ”
Assuming we could build a spaceship that will accelerate an astronaut snug to the upper of light , only for them to come back a few hour later on ( in the cosmonaut ’s time skeletal system ) , through a quirk of theory of relativity it ’s potential that thousand of twelvemonth would have buy the farm on Earth . Therefore , the superfast starship will have become a prison term car ! Want to go further into the future ? No problem ! vaporize the starship even faster .
( Keep in mind that it ’s still inconceivable — harmonise to our current knowledge of space , time and expert ol’ fashioned physics — to journey faster than the speed of light , but travel at any fraction of the hurrying of light is still allowed in natural philosophy . The technology of such a car , on the other hand , would require some jolly epic actuation engineering science behind it . )
“ If you go fast , your clock runs slow relative to citizenry who are still . As you draw exit the speed of visible light , your clock runs so slow you could come back 10,000 years in the future , ” he said .
Cox is basically describing a far-famed sentiment experiment learn to university scholarly person around the worldly concern as the “ Twin Paradox . ”
Imagine Twin Falls , one remain on Earth ( Twin A ) while the other ( Twin B ) board a spaceship and fly off at relativistic speeds . equate with Twin A ’s timeframe , Twin B ’s timeframe will slow down . If time is running slower for Twin B , then he / she will devolve to Earth where a lot more time has pass and Twin A has senesce significantly more than Twin B. The chemical mechanism behind this is “ clock time dilatation ” and it has a stronger issue as you travel closer and closer to the speed of light .
So far , Cox has described a time machine ( a.k.a . a relativistic starship ) stuck in fast forrard . What would it take to wind back the years and test out the “ Grandfather Paradox ” ? ( Warning : If you just so happened to find yourself in the past do n’t bother testing out this paradox . coddler : It could terminate very badly for you . )
Well , that would require some fairly fancy and alien physics .
“ In General Relativity , you’re able to do it in rule , ” allege Cox . “ It ’s to do with building these things call wormhole ; shortcut through space and time . But most physicist doubt it . hawk come up with the ‘ chronology protection speculation ’ – cathartic we do n’t yet understand that mean wormholes are not stable . ”
A consequence of some of Einsteins relativity equations predict the macrocosm of wormholes — but they are not travelable wormholes ( i.e. you ca n’t pack your bags and jump into one of these quirks of spacetime ) , they are short - lived , little scurf anomalies . To make a wormhole from science fabrication , you ’d demand an exotic course of matterthat can stabilise the mouth of a wormhole using negatively charged get-up-and-go .
Currently , such a form of matter is pure theory , but if it were to be find out or manufactured , it would be passably utile for clock time traveland , potentially , interstellar traveling .
For now , the only conceivable time machine is one that ’s stuck in fast frontwards .
Brian CoxFuturismPhysicsScience
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