TIME TRAVEL: Fact of Fiction

[Gaijin]

Kiranga;
OK simply treat it like this: In the absence of an entity X, other than itself, time has got no direction. Let's replace an observer with an entity, which might just be anything other than time itself.

If I understood you correctly, you are trying to compare the concept behind the "loss" of direction of space for a person taken away from a large entity (earth), to that of time

For time it's different in the sense that the direction of time is in all particles of the universe. Moving from low to high entropy - from the time of the Big Bang when entropy was the smallest towards the expansion of the universe with increased entropy

So as long as there is the universe there is time and is moving in one direction

 

[Makanyaga]

Correct.

In the sense that..

Even if one were to say that time is real and not abstract, in that it can be measured, it turns out the measurement is hardly absolute per classical Newtonian physics, but an illusion of our frame of reference per relativistic Einsteinian physics.

Speed slows down the passage (mind you, the actual passage, not mere measurement, a big distinction) of time, so does gravity. This is why if you were able to attain the speed of light, all time would stop for you while not stopping for the rest of the world.

To electromagnetic waves, which move at the speed of electromagnetic waves/ light, the universe is timeless.

And if a particle would move faster than light, then the direction of time would be reversed, time would move from the future to the past, which poses a lot of problems for causality, one reason why time travel is not possible.

If you have twins born today, and one was sent on a trip to a Alpha Centauri, the closest star system, at relativistic speeds, while the other was to remain on earth, the twin who embarked on this audacious trip could take just over 8 years roundtrip, coming back as about an 8 year old, while the twin who remained on earth could easily have aged to 100 years.

The reason being that the relativistic speeds on the spaceship slowed down the passage of time and therefore aging, while the twin on earth did not experience this time dilation.

This time dilation happens everytime you move, albeit at a very negligible scale.

Kiranga;
In the quoted case above, you are referring to an hypothetical twin paradox case where one of them leaves for a round trip in a spaceship traveling at a speed approximately equal to BUT less than that of light. What do you think would happen if the speed of the spaceship in which one of the twins travels, were equal or greater than that of light?

 

[Mbwiga88]

Salaam wakuu,
Nakumbuka wakati nipo mdogo kuna muvi baba aliinunua inaitwa Back To The Future iliyoactiwa na Mathew J FOx. Muvi hii ilikua inaonesha jinsi mtu anavoweza kusafiri katika muda (time travel) kurudi kipindi cha nyuma. I was fascinated by this technology nikadhani ni kweli inawezekana at that time. Sasa nimekuja kusoma baadhi ya articles ambazo zinaelezea swala hili, kuna jamaa akaniambiwa according to Newton's theory of relativity, ukiweza kutravel kwa speed kubwa ukauzidi mwanga, then unawea kusafiri katika muda. Juzi juzi kuna documentary ya jamaa mmoja nimesahau jina lake ila inaitwa Conspiracy theories, kuna jamaa mmarekani alikiri kwamba teknolojia hii ipo naimekua ikitumiwa na US DOD kwa miaka kadhaa na akatoa ushahidi wa picha jinsi alivyotravel in time wakat yupo mdogo nakutokea katkat ya uwanja karibu na sehem raisi Kenedy (kama sijkosea) alikua anasalimiana na watu. Naomba kwa wataalamu wakuu wa mambo ya kisayansi waweze kunijuza mimi pia na wengine wasiofahamu, kama hii teknolojia scientifically imeshawezekana na mechanism yake.
NB; kama inawezekana aisee nitaomba nirudi year 1905 wakat wa mwanzo wa vita vya maji maji nimuone kinjekitile anavyowazuga raia na dawa yake feki ya maji.

kwanza naomba tuwekane sawa hapa the theory of relativity was put forward by Albert Einstein and not Newton as u hav suggested...till now time travel is still a theory since to do so it requires an enormous amount of energy..which is way beyond our current technology...for details read the following books;Parallel worlds by dr. Michio kaku,the grand design and God made the intergers both by Steven Hawking

 

[Kiranga]

Kiranga;
In the quoted case above, you are referring to an hypothetical twin paradox case where one of them leaves for a round trip in a spaceship traveling at a speed approximately equal to BUT less than that of light. What do you think would happen if the speed of the spaceship in which one of the twins travels, were equal or greater than that of light?

This is already answered above, moving at the speed of light stops time for the mover.

Moving faster than light would reverse time.

But neither is going to happen due to the fact that as a body's speed tends to the speed of light, it's mass tends to infinity.

 

[Ngahekapahi]

Mkuu Kwangu mimi ni point of correction tu,relativity theory ilikuwa ni ya Einstein na Mpaka anakufa hakuwahi prove hiyo theory.

 

[Kiranga]

kwanza naomba tuwekane sawa hapa the theory of relativity was put forward by Albert Einstein and not Newton as u hav suggested...till now time travel is still a theory since to do so it requires an enormous amount of energy..which is way beyond our current technology...for details read the following books;Parallel worlds by dr. Michio kaku,the grand design and God made the intergers both by Steven Hawking

From relativistic mathematics, the energy required is not only enormous, but infinite.

Even if we are talking about moving the smallest mass possible - let alone a person or spaceship- at the sped of light, so long as it is massive, however minutiae.

 

[Makanyaga]

This is already answered above, moving at the speed of light stops time for the mover.

Moving faster than light would reverse time.

But neither is going to happen due to the fact that as a body's speed tends to the speed of light, it's mass tends to infinity.

moving at the speed of light stops time for the mover, and therefore NO AGING. The twin in the spaceship won't age.

Moving faster than light would reverse time. THIS WOULD TAKE BACK SOMEONE TO HIS/HER MOTHER'S WOMB, exactly like you said before.

 

[Kiranga]

Mkuu Kwangu mimi ni point of correction tu,relativity theory ilikuwa ni ya Einstein na Mpaka anakufa hakuwahi prove hiyo theory.

Theory huwa haiwi proved, ndo maana inaitwa theory, ila inaweza kuwa disproved.

Relativity imepimwa experimentally na kutoa majibu iliyotabiri kuhusu uwezo wa gravity kupinda space katika experiment iliyofuatia kupatwa kwa jua kwa mwaka 1919, experiment iliyofanywa na Sir Arthur Eddington.

Katika sayansi, theory inapata kuonekana ina nguvu kama ina uwezo wa kutabiri vitu na vikatokea sawa na utabiri wake. Kitu ambacho relativity imefanya. Mpaka leo GPS systems zinatumia relativity.

Watu wengi wamejaribu ku disprove relativity lakini wameshindwa. Wakiwamo kina Prof Antonio Erediato ambao walishaanza kusema wamefanikiwa kufanya neutrino ipite speed ya mwanga.

Soma hapa.

BBC News - Neutrino 'faster than light' scientist resigns

Einstein alichoshindwa kufanya mpaka anakufa - na ambacho mpaka leo hakijawezekana bado- ni kuunganisha theory ya relativity na quantum theory.

 

[Kiranga]

moving at the speed of light stops time for the mover, and therefore NO AGING. The twin in the spaceship won't age.

Moving faster than light would reverse time. THIS WOULD TAKE BACK SOMEONE TO HIS/HER MOTHER'S WOMB, exactly like you said before.

Yeah, so next time someone talks about needing the fountain of youth, tell them to move at the speed of light.

Or better yet, surpass it and reverse the aging process, although they won't be able to enjoy anything.

All the drinks and dinners will be flowing from their stomach.

 

[kahtaan]

My friends!
Stop wasting your time for this day dreams! Lets use our brain on something contractive!
You and I we all know this is nothing but a dream!
And unfortunately people prefer to live in a dream rather than face the reality and facts!
NO SUCH A THING AS "TIME MACHINE"
NO SUCH A THING AS "HUMAN BE ABLE TO LIVE IN A DEFERENT PLANET"
NO SUCH A THING AS ALIENS!
NO SUCH A THING AS MOON LANDING!
NO SUCH A THING AS HUMAN BE ABLE TO TRAVEL TO MARS ALIVE!

Wake up!! People! ! OUR POOR NATION STILL NEED YOU!

 

[Makanyaga]

Mkuu Kwangu mimi ni point of correction tu,relativity theory ilikuwa ni ya Einstein na Mpaka anakufa hakuwahi prove hiyo theory.

Theroy iko proved, ndiyo mana inatumika. Sema haijaweza kuwa fully applied and implemented sababu technology iliyopo haiwezi kumeet requirements za theory hiyo.

Unajua hata mimi huwa ninatengeneza theory zangu kichwani lakni ninakwama vifaa vya kufanyia utekelezaji. Kwa mfano nilivyokuwa bado naishi kijijini, nilikuwa nakosa vifaa vya kuweza kufanya "land tilling" ya hata square km 10 kwa saa moja, ila tatizo lkinakuwa ni vifaa.

 

[Makanyaga]

My friends!
Stop wasting your time for this day dreams! Lets use our brain on something contractive!
You and I we all know this is nothing but a dream!
And unfortunately people prefer to live in a dream rather than face the reality and facts!
NO SUCH A THING AS "TIME MACHINE"
NO SUCH A THING AS "HUMAN BE ABLE TO LIVE IN A DEFERENT PLANET"
NO SUCH A THING AS ALIENS!
NO SUCH A THING AS MOON LANDING!
NO SUCH A THING AS HUMAN BE ABLE TO TRAVEL TO MARS ALIVE!

Wake up!! People! ! OUR POOR NATION STILL NEED YOU!

Ukimfufua sasa hivi baba wa babu yangu aliyefariki miaka zaidi ya 100 iliyopita halafu ukamwonyesha kitu kidogo tu kama TV, muda huo huo anaweza aka-collapse na kufariki tena kwa mara ya pili. Hii ni kutokana na mshangao atakaoupata. Hii basi inamaanisha kwamba, kipindi yupo hai, angetokea mtu akamweleza juu ya uwepo wa Tv na matumizi yake, angeweza kutoa majibu na hoja exactly kama ulizozitoa wewe hapa hii kwenye hii quote.

Hivyo basi, lazima tuwe na mawazo ya kujiongeza angalau na sisi tutumie hizi theory walizotuachia wenzetu, kufanya kitu ambacho vizazi vijvyo vitakuja ku-appreciate kuwa kuna watu waliwahi kufanya kazi huko nyuma. Tusiwe na mawazo ya kumeza tu, ainabidi tuwe na uwezo wa angalu kutafuna chakula tulichotayarishiwa maana tukiendelea na mtizamo kama ule wa kwako kuna siku tutakuja kumeza chakula ambacho kumbe hakijatafunwa, tukidhania kuwa kmetafunwa (sababu tulishazoea kumeza vilivyotafunwa tayari) halafu kitakuja kutukwama kooni

 

[Mndengereko]

Mdau hii ni Science fiction ipo, ki Movie zaidi hebu tafuta Movie ya Will Smith MIB 3 ina hiyo kitu.

Cheki hii nukuuu


Pia tazama hii documentary(Youtube) National Geographic Time Travel The Truth
National Geographic Time Travel The Truth {Full Documentary} - YouTube

i will get back to you let me have a look at this documenatary

 

[Kiranga]

I was reading this piece on Pulse/ Discovery News about a new paper on TT, making some of the points we touched on.
It reminded me of this thread.

Time Travel? Don't Forget to Pack Your Wormhole : Discovery News

Time Travel? Don't Forget to Pack Your Wormhole – Discovery News


The concept of a time machine typically conjures up images of an implausible plot device used in a few too many science-fiction storylines. But according to Albert Einstein's general theory of relativity, which explains how gravity operates in the universe, real-life time travelisn't just a vague fantasy.

Traveling forward in time is an uncontroversial possibility, according to Einstein's theory. In fact, physicists have been able to send tiny particles called muons, which are similar to electrons, forward in time by manipulating the gravity around them. That's not to say the technology for sending humans 100 years into the future will be available anytime soon, though.

VIDEO: Is Time Travel Possible?

Time travel to the past, however, is even less understood. Still, astrophysicist Eric W. Davis, of the EarthTech International Institute for Advanced Studies at Austin, argues that it's possible. All you need, he says, is a wormhole, which is a theoretical passageway through space-time that is predicted by relativity.
"You can go into the future or into the past using traversable wormholes," Davis told LiveScience.

Where's My Wormhole?
Wormholes have never been proven to exist, and if they are ever found, they are likely to be so tiny that a person couldn't fit inside, never mind a spaceship.
Even so, Davis' paper, published in July in the American Institute of Aeronautics and Astronautics' journal, addresses time machines and the possibility that a wormhole could become, or be used as, a means for traveling backward in time.
Both general relativity theory and quantum theory appear to offer several possibilities for traveling along what physicists call a "closed, timelike curve," or a path that cuts through time and space - essentially, a time machine.

NEWS: Time Travel ‘Impossible'?
In fact, Davis said, scientists' current understanding of the laws of physics "are infested with time machines whereby there are numerous space-time geometry solutions that exhibit time travel and/or have the properties of time machines."
A wormhole would allow a ship, for instance, to travel from one point to another faster than the speed of light - sort of. That's because the ship would arrive at its destination sooner than a beam of light would, by taking a shortcut through space-time via the wormhole. That way, the vehicle doesn't actually break the rule of the so-called universal speed limit - the speed of light - because the ship never actually travels at a speed faster than light.

Theoretically, a wormhole could be used to cut not just through space, but through time as well.
"Time machines are unavoidable in our physical dimensional space-time," David wrote in his paper. "Traversable wormholes imply time machines, and (the prediction of wormholes) spawned a number of follow-on research efforts on time machines."
However, Davis added, turning a wormhole into a time machine won't be easy. "It would take a Herculean effort to turn a wormhole into a time machine. It's going to be tough enough to pull off a wormhole," he told LiveScience.
That's because once a wormhole is created, one or both ends of it would need to be accelerated through time to the desired position, according to general relativity theory.


Challenges Ahead
There are several theories for how the laws of physics might work to prevent time travel through wormholes.
"Not only do we assume (time travel into the past) will not be possible in our lifetime, but we assume that the laws of physics, when fully understood, will rule it out entirely," said Robert Owen, an astrophysicist at Oberlin College in Ohio who specializes in black holes and gravitation theory.

According to scientists' current understanding, keeping a wormhole stable enough to traverse requires large amounts of exotic matter, a substance that is still very poorly understood.
General relativity can't account for exotic matter -- according to general relativity, exotic matter can't exist. But exotic matter does exist. That's where quantum theory comes in. Like general relativity, quantum theory is a system for explaining the universe, kind of like a lens through which scientists observe the universe.


However, exotic matter has only been observed in very small amounts -- not nearly enough to hold open a wormhole. Physicists would have to find a way to generate and harness large amounts of exotic matter if they hope to achieve this quasi-faster-than-light travel and, by extension, time travel.

Furthermore, other physicists have used quantum mechanics to posit that trying to travel through a wormhole would create something called a quantum back reaction.
In a quantum back reaction, the act of turning a wormhole into a time machine would cause a massive buildup of energy, ultimately destroying the wormhole just before it could be used as a time machine.

However, the mathematical model used to calculate quantum back reaction only takes into account one dimension of space-time.
"I am confident that, since (general relativity) theory has not failed yet, that its predictions for time machines, warp drives and wormholes remain valid and testable, regardless of what quantum theory has to say about those subjects," Davis added.
This illustrates one of the key problems in theories of time travel: physicists have to ground their arguments in either general relativity or quantum theory, both of which are incomplete and unable to encompass the entirety of our complex, mysterious universe.


Read more at Discovery News

 

[Baba Swalehe]

I was reading this piece on Pulse/ Discovery News about a new paper on TT, making some of the points we touched on.
It reminded me of this thread.

Time Travel? Don't Forget to Pack Your Wormhole : Discovery News

Time Travel? Don't Forget to Pack Your Wormhole – Discovery News


The concept of a time machine typically conjures up images of an implausible plot device used in a few too many science-fiction storylines. But according to Albert Einstein's general theory of relativity, which explains how gravity operates in the universe, real-life time travelisn't just a vague fantasy.

Traveling forward in time is an uncontroversial possibility, according to Einstein's theory. In fact, physicists have been able to send tiny particles called muons, which are similar to electrons, forward in time by manipulating the gravity around them. That's not to say the technology for sending humans 100 years into the future will be available anytime soon, though.

VIDEO: Is Time Travel Possible?

Time travel to the past, however, is even less understood. Still, astrophysicist Eric W. Davis, of the EarthTech International Institute for Advanced Studies at Austin, argues that it's possible. All you need, he says, is a wormhole, which is a theoretical passageway through space-time that is predicted by relativity.
"You can go into the future or into the past using traversable wormholes," Davis told LiveScience.

Where's My Wormhole?
Wormholes have never been proven to exist, and if they are ever found, they are likely to be so tiny that a person couldn't fit inside, never mind a spaceship.
Even so, Davis' paper, published in July in the American Institute of Aeronautics and Astronautics' journal, addresses time machines and the possibility that a wormhole could become, or be used as, a means for traveling backward in time.
Both general relativity theory and quantum theory appear to offer several possibilities for traveling along what physicists call a "closed, timelike curve," or a path that cuts through time and space - essentially, a time machine.

NEWS: Time Travel ‘Impossible'?
In fact, Davis said, scientists' current understanding of the laws of physics "are infested with time machines whereby there are numerous space-time geometry solutions that exhibit time travel and/or have the properties of time machines."
A wormhole would allow a ship, for instance, to travel from one point to another faster than the speed of light - sort of. That's because the ship would arrive at its destination sooner than a beam of light would, by taking a shortcut through space-time via the wormhole. That way, the vehicle doesn't actually break the rule of the so-called universal speed limit - the speed of light - because the ship never actually travels at a speed faster than light.

Theoretically, a wormhole could be used to cut not just through space, but through time as well.
"Time machines are unavoidable in our physical dimensional space-time," David wrote in his paper. "Traversable wormholes imply time machines, and (the prediction of wormholes) spawned a number of follow-on research efforts on time machines."
However, Davis added, turning a wormhole into a time machine won't be easy. "It would take a Herculean effort to turn a wormhole into a time machine. It's going to be tough enough to pull off a wormhole," he told LiveScience.
That's because once a wormhole is created, one or both ends of it would need to be accelerated through time to the desired position, according to general relativity theory.


Challenges Ahead
There are several theories for how the laws of physics might work to prevent time travel through wormholes.
"Not only do we assume (time travel into the past) will not be possible in our lifetime, but we assume that the laws of physics, when fully understood, will rule it out entirely," said Robert Owen, an astrophysicist at Oberlin College in Ohio who specializes in black holes and gravitation theory.

According to scientists' current understanding, keeping a wormhole stable enough to traverse requires large amounts of exotic matter, a substance that is still very poorly understood.
General relativity can't account for exotic matter -- according to general relativity, exotic matter can't exist. But exotic matter does exist. That's where quantum theory comes in. Like general relativity, quantum theory is a system for explaining the universe, kind of like a lens through which scientists observe the universe.


However, exotic matter has only been observed in very small amounts -- not nearly enough to hold open a wormhole. Physicists would have to find a way to generate and harness large amounts of exotic matter if they hope to achieve this quasi-faster-than-light travel and, by extension, time travel.

Furthermore, other physicists have used quantum mechanics to posit that trying to travel through a wormhole would create something called a quantum back reaction.
In a quantum back reaction, the act of turning a wormhole into a time machine would cause a massive buildup of energy, ultimately destroying the wormhole just before it could be used as a time machine.

However, the mathematical model used to calculate quantum back reaction only takes into account one dimension of space-time.
"I am confident that, since (general relativity) theory has not failed yet, that its predictions for time machines, warp drives and wormholes remain valid and testable, regardless of what quantum theory has to say about those subjects," Davis added.
This illustrates one of the key problems in theories of time travel: physicists have to ground their arguments in either general relativity or quantum theory, both of which are incomplete and unable to encompass the entirety of our complex, mysterious universe.


Read more at Discovery News

endelea mkuu

 

[Intel5500]

sasa hii mifano yako ndio inayosababisha mparaganyiko wa fikra!! huwezi kujiuliza kitu ambacho logic haikubaliani nacho eti huenda ukagundua kitu usichokijua!!

anaeuliza kwa nini rangi ya blue ni blue!! yeye lengo lake ni kujua sababu? au ana jambo lingine anatafuta??

unapoanza kujiuliza kitu unatakiwa uwe na lengo !!

Mfano mwingine wa fikra au elimu isio na manufaa ni kama ule wa kwenda kuangalia kama kuna uwezekano wa kuwa na maisha ktk MARS!!
Wakati hii dunia tunayoishi, binaadamu ame occupied only 10% ya dunia! na 90% iko tupu!!

NA wakati huo huo USA wanatumia billions of dollars kwenda kwenye misheni zisizo na faida WAKATI NYUMBA KWAO KUNA ALMOST 3 MILLION PEOPLES HOMELESS!! WAKATI WA WINTER WATU WANAKUFA NA BARIDI KWA KULALA MITAANI!!

sasa hii time travel ina lengo lipi?? hebu nisaidie hapo!! manake ukiishughulisha sana akili kwenye mambo yasio na maana! jamii inaweza athirika na wewe huna hata habari!! KAMA HAO WAZUNGU WANAOJIFANYA KUWAV NA AKILI NYINGI!!

Hebu tuumize vichwa kujaribu kutatua matatizo tulionayo kwanza!! tena yako mengi mno!! Hii time travel tuiache kwenye MOVIES KWANZA!!

Bora musk alikimbia Africa lasivyo angekuwa na akili kama zako zilizoganda....watu wanaunguza billions wewe unaleta mawazo ya kimakalio....hiyo simu na kila kitu vyote vilianza n udadisi acha ujinga...

 

[Squidward]

There is no such thing

 

[kahtaan]

Bora musk alikimbia Africa lasivyo angekuwa na akili kama zako zilizoganda....watu wanaunguza billions wewe unaleta mawazo ya kimakalio....hiyo simu na kila kitu vyote vilianza n udadisi acha ujinga...

Bi mkubwa ningekujibu lkn nahofia usije Chapwa na mumeo.
Pole kwa kukosa maarifa.

 

[Bujibuji Simba Nyamaume]

Salaam wakuu,
Nakumbuka wakati nipo mdogo kuna muvi baba aliinunua inaitwa Back To The Future iliyoactiwa na Mathew J FOx. Muvi hii ilikua inaonesha jinsi mtu anavoweza kusafiri katika muda (time travel) kurudi kipindi cha nyuma.

I was fascinated by this technology nikadhani ni kweli inawezekana at that time. Sasa nimekuja kusoma baadhi ya articles ambazo zinaelezea swala hili, kuna jamaa akaniambiwa according to Newton's theory of relativity, ukiweza kutravel kwa speed kubwa ukauzidi mwanga, then unawea kusafiri katika muda. Juzi juzi kuna documentary ya jamaa mmoja nimesahau jina lake ila inaitwa Conspiracy theories, kuna jamaa mmarekani alikiri kwamba teknolojia hii ipo naimekua ikitumiwa na US DOD kwa miaka kadhaa na akatoa ushahidi wa picha jinsi alivyotravel in time wakat yupo mdogo nakutokea katkat ya uwanja karibu na sehem raisi Kenedy (kama sijkosea) alikua anasalimiana na watu.

Naomba kwa wataalamu wakuu wa mambo ya kisayansi waweze kunijuza mimi pia na wengine wasiofahamu, kama hii teknolojia scientifically imeshawezekana na mechanism yake.

NB; kama inawezekana aisee nitaomba nirudi Year 1905 wakat wa mwanzo wa vita vya maji maji nimuone kinjekitile anavyowazuga raia na dawa yake feki ya maji.

Only wavuta bange can travel either to the future or to the past. Warm hall is not existing in our physical world

 

[PCGAMES]

My friends!
Stop wasting your time for this day dreams! Lets use our brain on something contractive!
You and I we all know this is nothing but a dream!
And unfortunately people prefer to live in a dream rather than face the reality and facts!
NO SUCH A THING AS "TIME MACHINE"
NO SUCH A THING AS "HUMAN BE ABLE TO LIVE IN A DEFERENT PLANET"
NO SUCH A THING AS ALIENS!
NO SUCH A THING AS MOON LANDING!
NO SUCH A THING AS HUMAN BE ABLE TO TRAVEL TO MARS ALIVE!

Wake up!! People! ! OUR POOR NATION STILL NEED YOU!

Watu kama wewe walikuwepo kipindi hamna smartphones, flat screen, internet, robots (AI, ML), aeroplane + helicopter, moto vehicle, electricity, television, radio na vingine vingi. Walibisha sana kuwa hivi vyote haviwezi kamwe kuwepo wala kutokea. Waliokuwa wanatengeneza hivi vitu walionekana wendawazimu, wanaomkufuru Mungu, wanapoteza muda wao lakini vyote hivyo vipo vimefanikiwa kuwepo na vitakuja vingine zaidi ya hivyo.

Unapozungumzia masuala ya sayansi na teknolojia ni mambo mapana sana...