The theory of relativity states that as the velocity of an object nears the speed of light, time slows down.
If person A travels for a few hours at half the speed of light and returns to Earth, that person A has aged much slower than person B who stayed on Earth. This difference in aging is because time passed much slower for person A than person B, because person A was traveling closer to the speed of light. While just a few hours passed for person A, person B experienced many years.
Let's say we have a wormhole which mouth is portable. It is then carried on a spacecraft traveling at 50 percent of light speed. The other end of the wormhole is on Earth.
When the spacecraft returned to Earth a few hours (according to the spacecrafts clock)later a few years would have passed on Earth.
Okay, so far so good.
But do we now have a time machine? No, we do not. Time has only passed slower for the other end of the wormhole.
The effect of going through the wormhole would be the same as if you stepped through a space shuttle's porthole after it returned from a mission. Time in the shuttle would have only passed slower, it does not become a time machine into the past. You can't go back when there is nothing to go back to. Except maybe if you consider the shuttle is the past, because it has aged slower.
Ps. I'd be happy if anyone could show me if I'm wrong. Many of the world renown scientist seem to me as a bunch of idiots when it comes to time travel and I sure would be happy if it was just me who is the idiot.
[question posted by ready2earn]
responses and comments:
Fictional works – novels, short stories, fables, fairy tales, films, comics, interactive fiction, animation, video games – may include or reference factual occurrences. The term is also often used synonymously with literature and more specifically fictional prose. In this sense, fiction refers only to novels or short stories and is often divided into two categories, popular fiction (e.g., science fiction or mystery fiction) and literary fiction (e.g., Marcel Proust or William Faulkner). [ramya186]
What about that car that broke the sound bearer years ago, I know it's different, but if he traveled past where sound could reach him, would that not be a form of time travel too?! As far as time travel, I don't believe we can enter the past,however what about the future,since it has not happened yet, you just simplly arrived there sooner then most. [goofygrmp]
I was thiking about this some time ago too, but couldn't understand much about how speed and time are related, but your discussion made em thin even more. What if we were able to figure out how to build a time machine. Would it be a good idea? Because of the fact that 1 little thing could change a whole bunch of things, wouldn't it be dangerous? [GwilledWabbit]
awaisatw - you have copied text from the topic and pasted it as a response. Please refer to rule #2 of the mylot guidelines. This is a banning offense. You have been reported to mylot. [SKSOUTH]
accordin to my knowledge time travel is not possible.the process of aging depends completly on the human body. any action can define by the time interval between two stiks of light rays ojn your eyes. so if a person is travelling at the speed of light the light rays would not strike ur eyes as u would be going in parallel with it. so u feel that time has stopped. u cannot go in the past or the future. [rishi_raju]
that is not so true hehe. How can you go back to time or travel time example you are here on earth and the time travel destination is on earth too. so both of you are staying on earth but with different time? so that is so impossible. But maybe 3million years from now. or 1000 years from now it will be possible heheheh. [coolcager]
Time Travel could be not science-fiction in the future, there are many theories about this topic, in my oppinion i think thats posibble back at the past but its much more harder going to the future. Have a nice day on mylot! [blanksolid]
From what I can understand it would actually be easier to go to the future. If light speed and time are linked to gether and as you reach the spped of light, your time slows down. It would be easier to come close to the speed of light as opposed to going faster to be able to go backwards in time. I hope that made sence. [mikeyr6000le]
yeah.I can see it too now. I´m starting to read Stephen hawking 's books [toad02]
Science fiction is just another form of entertainment. It contains a mixture of science facts that add depth to the fictional elements of the stories. Time travel is just an element of entertaining story telling that holds our interest because almost everyone on the planet has thought at one point in time that if they could just go back and change something they would. Your theory seems sound enough. But sometimes it can be fun to think outside the box and explore our imagination. [Centregeek]
I agree with your analysis and would just like to add that it is HIGHLY unlikely a spacecraft capable of travelling at 50% of the speed of light could ever be built. Light travels at 670,616,629.384 miles per hour. 50% of that would be 335.3 MILLION miles per hour. By way of comparision, the Space Shuttle 'only' hits about 17 and a half THOUSAND mph on re-entry, and that's when it's essentially in freefall. The idea of building a spaceship that could travel at hundred of millions of miles per hour is totally impractical. What fuel could possibly produce the amount of energy needed to propel something that fast? How could the amount you'd need be portable enough to even leave the earth? What kind of material could withstand that insane level of speed? Time travel and interstellar travel are pure science fiction. [marmalaide]
The current technology is not allowing that to happen. But in future it could just be possible. It's hard to ask a cave man imagine on how to build a Supersonic jet. Before man invent air craft, travelling by air is near to impossible to man kind. [cheongyc]
This is very interesting. It's like those movies which features time machine. But for me, it shouldn't be a matter anymore. All impossible things the people made it possible are just a sign of none satisfaction in life. I mean, God gave as life but people are keep on inventing powerful machines which is an advantage too but some are not. Remember a story of, why human beings got their own language? It says, all of them were trying to reach the heaven and started building blocks like a pyramid just to reach God. And then God sent different languages on the earth so that each of the people will hardly wont understand it. Then the pyramid got destroyed. [gotcho0O]
I think we have a discussion here about nothing...Time travel can be proved by scientists only in theory. That's all... [manase79]
Sorry, but i don't believe in time traveling! [postbusf]
I like your Avatar. Ok... if we could build a spacecraft that could travel the speed of light, then travel to the future is possible, but not the past. If you travel the speed of light to some distant galaxy - by the time you get back to earth it would be a completely different civilization as decades would have passed. So technically you are in the future. However you cannot go to the past. I don't buy all the stuff about wormholes. It makes interesting movies and books... [Withoutwings]
time never comes one it goes .i think time machine is always a imaginary one .but ur discussion is interesting . [vssornavel]
that ain't true!... even einstein proved this time travel couldn't possibly done!!... there is no way that human can travel through time!! [raymondbernard]
Albert Einstein showed that space is curved, time is relative, and time travel is theoretically possible. but what i think is that it is possible only in theory,, not in reality [anuragmishra]
i don knw if e = MC2 is really treu or not.... but if it s true... i belive time travel is possible. as "E" has to b constant always... if u get to travel wid a speed more than light...i ur mass gonna get reduced ... [subhadiproy]
i consider travelling in the space could be one of the time machine you have mention..(space shuttle could be one).. [vanities]
I've thought about this as well, and as far as I know, time travel is possible in that you can go to the future, but not the past. Time travel to the future is really more like... stasis from sci-fi in terms of effect. Go to sleep, wait for time to pass, wake up in the future having hardly aged. [mepersoner]
The theory states that this fact could happen only if the velocity nears the speed of light which is 3*100000000m/s.The spce crafts travel with a much lesser velocity than that.And i am sure that Mr Einstine is more intelligent than you and he would have surely made some research about it .So i think he is right and you are wrong. [muthunaveen]
this is the one topic that the whole world is always intrigued by. the most fascinating fantasy of man to travel back in time or go to the future. well there are already movies related to this. paycheck being an example. wel taken i must say but it al seems so impractical. highly impossible. scientists may argue to tis by saying that all discoveries and inventions of science have always been thought of impossible by man but forced to accept later wen they are proved. but this is something too far fetched. according to me time travel is imposible. but by the discussion you have given, whatever speed we travel at, time always passes a fraction slower.... something to think about.!!! [prap81287]
Newton's most important contribution to science was his mathematical definition of how motion changes with time. He showed that the force causing apples to fall is the same force that drives planetary motions and produces tides. However, Newton was puzzled by the fact that gravity seemed to operate instantaneously at a distance. He admitted he could only describe it without understanding how it worked. Not until Einstein's general theory of relativity was gravity changed from a "force" to the movement of matter along the shortest space in a curved spacetime. The Sun bends spacetime, and spacetime tells planets how to move. For Newton, both space and time were absolute. Space was a fixed, infinite, unmoving metric against which absolute motions could be measured. Newton also believed the universe was pervaded by a single absolute time that could be symbolized by an imaginary clock off somewhere in space. Einstein changed all this with his relativity theories, and once wrote, "Newton, forgive me." Einstein's first major contribution to the study of time occurred when he revolutionized physics with his "special theory of relativity" by showing how time changes with motion. Today, scientists do not see problems of time or motion as "absolute" with a single correct answer. Because time is relative to the speed one is traveling at, there can never be a clock at the center of the universe to which everyone can set their watches. Your entire life is the blink of an eye to an alien traveling close to the speed of light. Today, Newtonian mechanics have become a special case within Einstein's theory of relativity. Einstein's relativity will eventually become a subset of a new science more comprehensive in its description of the fabric of our universe. (The word "relativity" derives from the fact that the appearance of the world depends on our state of motion; it is "relative.") We are a moment in astronomic time, a transient guest of the Earth. Our wet, wrinkled brains do not allow us to comprehend many mysteries of time and space. Our brains evolved to make us run from saber-toothed cats on the American savanna, to hunt deer, and to efficiently scavenge from the kills of large carnivores. Despite our mental limitations, we have come remarkably far. We have managed to pull back the cosmic curtains a crack to let in the light. Questions raised by physicists, from Newton to Kurt Gödel to Einstein to Stephen Hawking, are among the most profound we can ask. Is time real? Does it flow in one direction only? Does it have a beginning or an end? What is eternity? None of these questions can be answered to scientists' satisfaction. Yet the mere asking of these questions stretches our minds, and the continual search for answers provides useful insights along the way. The future of time travel -------------------------------------------------------------------------------- Various researchers have proposed ways in which backward and forward time machines can be built that do not seem to violate any know laws of physics. Remember that the laws of physics tell us what is possible, not what is practical for humans at this point in time. The physics of time travel is still in its infancy. While all physicists today admit that time travel to the future is possible, many still believe time travel to the past will never be easily attainable. Don't believe anyone who tells you that humans will never have efficient technology for backward and forward time travel. Accurately predicting future technology is nearly impossible, and history is filled with underestimates of technology: "Heavier-than-air flying machines are impossible." (Lord Kelvin, president, Royal Society, 1895) "I think there is a world market for maybe five computers." (Thomas Watson, chairman of IBM, 1943) "There is no reason for any individual to have a computer in their home." (Ken Olsen, president, chairman and founder of Digital Equipment Corp., 1977) "The telephone has too many shortcomings to be seriously considered as a means of communication. The device is inherently of no value to us." (Western Union internal memo, 1876) "Airplanes are interesting toys but of no military value." (Marshal Ferdinand Foch, French commander of Allied forces during the closing months of World War I, 1918) "The wireless music box has no imaginable commercial value. Who would pay for a message sent to nobody in particular?" (David Sarnoff's associates, in response to his urgings for investment in radio in the 1920's) "Professor Goddard does not know the relation between action and reaction and the need to have something better than a vacuum against which to react. He seems to lack the basic knowledge ladled out daily in high schools." (New York Times editorial about Robert Goddard's revolutionary rocket work, 1921) "Who the hell wants to hear actors talk?" (Harry M. Warner, Warner Brothers, 1927) "Everything that can be invented has been invented." (Charles H. Duell, commissioner, US Office of Patents, 1899) Wouldn't it be a wild world to live in if time travel devices played important roles in the development of humanity—like the computer and the telephone? Mathematicians dating back to Georg Bernhard Riemann (1826-1866) have studied the properties of multiple connected spaces in which different regions of space and time are spliced together. Physicists, who once considered this an intellectual exercise for armchair speculation, are now seriously studying advanced branches of mathematics to create practical models of our universe. Science-fiction stories about space travel have already inspired humans to travel to the moon. Similarly, will time-travel stories inspire us to create real time-travel mechanisms? Will we ever find a way to overcome the Einstein speed limit and make all of spacetime home? I wonder what humanity will discover about spacetime in the next century. Around four billion years ago, living creatures were nothing more than biochemical machines capable of self-reproduction. In a mere fraction of this time, humans evolved from creatures like Australopithecus. Today humans have wandered the moon and have studied ideas ranging from general relativity to quantum cosmology. Who knows into what beings we will evolve? Who knows what intelligent machines we will create that will be our ultimate heirs? These creatures might survive virtually forever, with our ideas, hopes, and dreams carried with them. There is a strangeness to the cosmic symphony that may encompass time travel, higher dimensions, quantum superspace, and parallel universes—worlds that resemble our own and perhaps even occupy the same space as our own in some ghostly manner. Stephen Hawking has even proposed using wormholes to connect our universe with an infinite number of parallel universes. Edward Witten is working hard on superstring theory, which has already created a sensation in the world of physics because it can explain the nature of both matter and spacetime. By realizing that the fundamental laws of physics appear simpler in higher dimensions, string theory can unite Einstein's theory of gravity with quantum theory in ten dimensions. Our heirs, whatever or whoever they may be, will explore space and time to degrees we cannot currently fathom. They will create new melodies in the music of time. There are infinite harmonies to be explored. Clifford Pickover is a research staff member at the IBM Thomas J. Watson Research Center. He is the lead writer for Discover Magazine's brain-boggler column and the author of Black Holes: A Traveler's Guide, among many other books. This article was adapted from: Time: A Traveler's Guide, by Clifford A. Pickover. Copyright © 1998 by Clifford Pickover. Used by permission of Oxford University Press, Inc. [umerasif]
oooo....wow..I love this discussion.There is a possibility for time travell.If you somehow arrange the situation ,we can travell the time path.This path is consist of BLACK HOLE.If we can go across the BALCK HOLE we can travell the time.But now Its really impossible but I dont now is it really impossible to our future or not [sann007m2]
First of all to travel in time (according to Eisteins relativity theory) you have to reach the speed of light! You are speaking about half of the speed of light, the speed its not enough to travel in time, you have to rich the speed of light! All you are saying is not correct! If you travel with de half of the speed of light 10 minutes, its light travilng with 100 Km/s for exmple 10 minutes (it has no effect) when you come back to earth only 10 minutes passed, not just for but also for everyone from earth! We do not know the time of the Universe we have just our time from earth (secunds, minutes, hours) maybe 10 minutes for the Universe mean for us a hole existence, we do not know! Have a nice day! [abigel_dark]
well this topic is really a very controversial topic. i think the concept oftime travel is just a fiction. how can you compare the parameters like speed to time? i am really sure this concept is just theoretical,fiction but practically impossible. [sananitish]
If we could reach the speed of light, things surrouding us (except those travelling at light speed) will seems to be static to us. The time could just be elaspe in the same way, but just that we 'feel' that the time is really slow for us. Imagine we could did a lot thing in just a nano second. Like you could clean your house, sweep your front yard, wash your car (at light speed) within a second. But the time is still passing away. Just that we feel that the time is 'slow' because we are 'fast'. Ok, apply this to the space travel. We could reach those unreachable distance when travelling at light speed, but the time is still having effect on us even we travel at light speed. We the time have no effect on the those thing travelling in light speed, then all the light source will be permanent (coz it won't change due to time effect and keep going perpertually) and we won't see the effect of reflection and refraction of light. Ok, regarding the wormhole, it's still possible. Our current technology still couldn't show us how space actually works. There could just be some space distortion occur where point A and point are linked together. So if you happen to move into point A then you just need to take one step forward to reach point B. While in fact, the linear distance between point A & point B are millions of light years away. Besides, i do think in order to enable object with static mass (like us) to travel at light speed, we need a lot of energy to 'super-charge' our body. In such a case, a distortion in space and time might occur, then it will be possible to affect the effect of time upon our body and showing the 'side effect' of travelling at the speed of light (age slower). [cheongyc]
I am lost on this one. I think that time travel can happen, but the question is are we opened-minded enough for it? [rogue13xmen13]
They look good in just novels,fiction and sci-fi movies.They are impossible as we cannot move with the speed of light.Even if we do we will see that time has stopped as the time intervals in doing things will not change.But it's impossible to turn back and bring the past in the present or future in the present..they sounds more fascinating that they appear.. [shyam4uall]
yes i also thing that time travel will always remain a fiction as mass has to be converted to energy to attain the speed of light than back to mass which is impossibble BUT MIND YOU THERE HAD BEEN MYSTERIOUS EXPERIMENTS REPORTED IN OPEN SEAS WHERE PHYSICAL DISAPPEARENCE HAS SAID TO BEEN TAKEN PLACE [mohsin3161]
Albert Einstein in his formula E=mc2 shows the connection between energy and mass. When you push an object it starts moving, that is speed. The weight of the object also increases, that is mass. But you would not have noticed that while you speed to work your time goes slowly and your weight increases. That is because those amounts are minute. When you approach the speed of light the time slows down tremendously. Your weight also increase similarly. At the speed of light your weight is infinite and time is at a stand still. That is why you can't exceed the speed of light, or even equal it. But light itself consisting of the Photon atom has a zero weight. So even at the speed of light it will be zero. Einstein's theories clearly explain why time travel cannot be achieved. But they say that your mind has a weight of zero. If you can release it from your body then you might be able to travel through time. [josephperera]
I don't think time travel is possible, once time is passed how do we go back? And if one day scientists do figure out a way they'll deserve every award going! [emisle]
We understand time as a concept related with space. Time is the unity that measures how long taes to go from point A to point B. If you are faster, then time is less, if you are slower then time is more... to travel in time, we would have to escape the dimension of being in time/space. And to be out of time and space, then we will have to be out of life. Re-incarnarion would be a way of coming back into this dimension and therefore travelled in time... the only thing is, tat most of us will never know if we reincarnated or is just an illusion that we want to believe. So, I agree with your title: Time travel is science fiction! [berlinlife]
Time travel is one of my favorite topics! I wrote some time travel stories in junior high school that used a machine of my own invention to travel backwards in time, and I have continued to study this fascinating concept as the years have gone by. We all travel in time. During the last year, I've moved forward one year and so have you. Another way to say that is that we travel in time at the rate of 1 hour per hour. But the question is, can we travel in time faster or slower than "1 hour per hour"? Or can we actually travel backward in time, going back, say 2 hours per hour, or 10 or 100 years per hour? It is mind-boggling to think about time travel. What if you went back in time and prevented your father and mother from meeting? You would prevent yourself from ever having been born! But then if you hadn't been born, you could not have gone back in time to prevent them from meeting. The great 20th century scientist Albert Einstein developed a theory called Special Relativity. The ideas of Special Relativity are very hard to imagine because they aren't about what we experience in everyday life, but scientists have confirmed them. This theory says that space and time are really aspects of the same thing--space-time. There's a speed limit of 300,000 kilometers per second (or 186,000 miles per second) for anything that travels through space-time, and light always travels the speed limit through empty space. Special Relativity also says that a surprising thing happens when you move through space-time, especially when your speed relative to other objects is close to the speed of light. Time goes slower for you than for the people you left behind. You won't notice this effect until you return to those stationary people. Say you were 15 years old when you left Earth in a spacecraft traveling at about 99.5% of the speed of light (which is much faster than we can achieve now), and celebrated only five birthdays during your space voyage. When you get home at the age of 20, you would find that all your classmates were 65 years old, retired, and enjoying their grandchildren! Because time passed more slowly for you, you will have experienced only five years of life, while your classmates will have experienced a full 50 years. So, if your journey began in 2003, it would have taken you only 5 years to travel to the year 2053, whereas it would have taken all of your friends 50 years. In a sense, this means you have been time traveling. This is a way of going to the future at a rate faster than 1 hour per hour. Time travel of a sort also occurs for objects in gravitational fields. Einstein had another remarkable theory called General Relativity, which predicts that time passes more slowly for objects in gravitational fields (like here on Earth) than for objects far from such fields. So there are all kinds of space and time distortions near black holes, where the gravity can be very intense. In the past few years, some scientists have used those distortions in space-time to think of possible ways time machines could work. Some like the idea of "worm holes," which may be shortcuts through space-time. This and other ideas are wonderfully interesting, but we don't know at this point whether they are possible for real objects. Still the ideas are based on good, solid science. In all time travel theories allowed by real science, there is no way a traveler can go back in time to before the time machine was built. I am confident time travel into the future is possible, but we would need to develop some very advanced technology to do it. We could travel 10,000 years into the future and age only 1 year during that journey. However, such a trip would consume an extraordinary amount of energy. Time travel to the past is more difficult. We do not understand the science as well. Actually, scientists and engineers who plan and operate some space missions must account for the time distortions that occur because of both General and Special Relativity. These effects are far too small to matter in most human terms or even over a human lifetime. However, very tiny fractions of a second do matter for the precise work necessary to fly spacecraft throughout the solar system. Visit The Space Place at spaceplace.nasa.gov and find out how one NASA mission is doing some very clever space-time experiments to test Einstein's theory of relativity using the International Space Station. Click[here] on "Make spacey things," then click on "Momentum Machine." [detrimentaldude]
I don't want to realise that time travelling will be one day easy to amke. Imagine! Someone does that and changes the whole history, not of his/her own life but the life on the planet also, as the history of us all is linked in between us. [remaster74]
i am definitely impressed by your theory but i have a question too i always wondered about this please any1 give the answer to this too theory is that if a peson travels with the velocity of light he becomes invisible so consider a space craft travelling with a velocity half of light and another with same velocity in opposit direction so velocities get added up so does the space craft become invisible????????? relative to the other space craft [guesswhomsa]
I don't really understand the wormhole part of ur argument, but I think ur idea in this is interesting and innovative. Moreover, I wonder how does it work that the other end of the wormhole keep still when one is travelling at half light speed. If it's still, and it travells at the same speed with the moving end, the time out of the both ends is the same. What do u think of this? [learnandearn]
Apparently there are lot of contradictions in our mind as to the theory of relativity and the practicality of the theory.The outcome can only be known when we have devised some means to travel at the speed of lght or near it,uptill then we can just feed our mind with just speculations. [go9999]
Time travel has been a sci-fi archetype for many moons now. Novels, movies, books, and video games have been devoted to this intriguing fantasy. [Chiriac]
Sci-fi, time travel and reality are all inter-related. Just because it is impossible for us at this point to travel in time doesn't make it "a pipe dream/wish" look at Jules vernes 20,000 legues under the sea we now have subs that can go to great depths or what about star trek, we are now working on a space station and are able to travel to the moon or mars these things only 60 odd years ago were things of sci-fi. What we want to happen will happen, just more than likely not in our life times. [searcher625]
actually time travel does exist on paper.for example you had just defined the side effects of travelling at near light speed.whereas,in theorey it is possible to manipulate time to an extent.read micheal crichton's time line.it is based mopre on reality than people think.it is not all fiction but is based on scientific principles! http://www.pbs.org/wgbh/nova/time/ http://freespace.virgin.net/steve.preston/Time.html http://www.lifesci.sussex.ac.uk/home/John_Gribbin/timetrav.htm [scorpius]
If I remember correctly, lets say if you travled to the next solar system at 50% the speed of light then travled back to earth faster at 75% speed of light would you pass yourself on the way to the next system? In fact then going back in time? Mind boggeling! Vey "star trekie" [RetiredTVguy2]
i think if we follow the science fiction we travel from usa to japan in 0.0002 sec or less !! [openedone]
Have you ever messed around with like, ok im gonna spell this all wrong, but, Phauntum phsyics and time travel and such? its really quiet spellbounding [JohnnyMurder]
im not saying we have proof of time travel but i would still like to believe its possible! one of my theories is that time being the 4th dimension can also be used as a medium of travel! the same way we move through the 3d world! after a certain speed is reached! we stop moving in the 3d world as we know it and start moving in the 4th dimension,TIME! hence making time travel possible! i havent yet thought of direction because i feel time has no particular direction! [drumm1n]
Science fiction is just another form of entertainment. It contains a mixture of science facts that add depth to the fictional elements of the stories. Time travel is just an element of entertaining story telling that holds our interest because almost everyone on the planet has thought at one point in time that if they could just go back and change something they would. Your theory seems sound enough. But sometimes it can be fun to think outside the box and explore our imagination. [usama18]
Ur Age is time you have spent on Earth. Calculation of time is all relative and totally numerical/theoritical. Putting all theories together and logically analyzing them does make one believe that travelling at a speed more than light will reverse one's age. I am not saying that this cannot happen or is absurd. But its difficult to believe untill u see it. Aging is also biological process. Biologically you cannot reverse the process but yes maybe theoretically you can. [sourin_som]
ye its rite its just a fiction, u can't travel in time, one can only dream of ths....: or watch it in movies like BACK TO THE FUTURE ETC>... [perfectkiller]
It's really a serious scientific topic. Also a topic everybody wanna think about,which makes the science fiction novel so popular. we still don't know if the current theory on space and time is right,I mean, whether the theory give a true explaination of the realationship between space and time. If it does,I think it seems the time travel is possible. But it is not returning the past, while it is going to the future. The man going through the wormhole can go to the future faster than the people on the earth. From his clock,he spent only one or two hours while it takes the people on the earth several years to go to the same date . He looks younger than his brothers. Does it seem that the person in past go to the future? I don't know the performance of the wormhole, is it reversible? I mean if you can go through it to the future side,can you go back to the starting side. If it does, it means we can return the past. If the wormhole is not reversible,then the people in the future side can't return past. They would go to their future if they go through the wormhole,and can't return his starting point forever. The basic theory is still under developing,so I don't know if it is reasonable to explain it with our current logic. That's my opinion! It's just my imagination because I have not read the relative theory carefully. I don't know if I expressed clearly. [maximus2006]
accordin to my knowledge time travel is not possible.the process of aging depends completly on the human body. any action can define by the time interval between two stiks of light rays ojn your eyes. so if a person is travelling at the speed of light the light rays would not strike ur eyes as u would be going in parallel with it. so u feel that time has stopped. u cannot go in the past or the future. [usama18]
I heard in empty space... time is differnt... can't rmember how... Not much help, aye? [flowerchilde]
If empty space = vacuum then the speed of light is different, but remember the theory isnot the speed of light but the speed of light in a vacuum [Infidel]
Time tarvel is a no-no, because if it was possible, why haven't the people from the future visited us? [tarachand]
Explained in next post [Infidel]
Time travel is possible but its not the same time travel that you see in media. in all the equations done but the theory of relativity there is no T (t being time) It is always t(squared) which means you can have both the positive and negative root(therefor negative time) This means that notonly can you not speed up to be faster then light ( or for that mater the same speed of light) but you cannot slow down to be slower the the speed of light and if you are travailing faster then light you are travailing in negative time (which we cannot explain since we cannot compare t and negative t (t=time)) however what you are trying to say is true its fairly sound within its theory but the backing is not, add what i have explained and it should work a bit better. [Infidel]
I believe you are wrong kind Sir! For I am Sir Homerlot! One of the prestigous Knights in the Round Table. I came from a wormhole inside a british toilet! Egad! [xtedaxcvg]
Time travel as indicated by its name is really travelling in the time. Whether we can travel in time or not is one of the burning question in the mordern days. What I think about time travel, ofcourse it is possible if we consider time as a dimension & relative. Ofcourse relativity restrict the max speed of any particle.But if consider the passing of time relative to one stationary we can travel in future. Let we have a person married having a six year old son.He moves with speed approx equal to light.Then in frame of him when he will return he will be only say 3 years old from time on earth but for his son may be 45 year has passed. Doesn't the man standing in future? As far as the question about travelling in past is considered may be it is possible with non interferance in the past or existance of parallel universe. Time travel is possible.Tome travel doesn't violet any physical law. Anyone deeply interested in knowing about time travel please let me know.I have a lots of useful links. [abhinavkumar1987]
The physics of 'Morris-Thorne wormholes' such as you've described has been well-examined by theoretical physicists. Einstein's theory of special relativity requires that 'space' and 'time' be given equal footing when describing the 'location' of the moving end of the wormhole; that is, the wormhole's position in both 'space' and 'time' are accounted for. The end of the wormhole that was moved at high speed actually does exit to a point in space-time that is in the past relative to the stationary end. A wealth of information can be found by searching the net for 'morris thorne wormhole'; below are a few links to start with. The second article by John Cramer suggests that perhaps a theory of quantum gravity will be found to impose limits that would prohibit Morris-Thorne wormholes from being created or used to violate the principle of causality, however there is nothing in Special Relativity to rule them out. http://www.lifesci.sussex.ac.uk/home/John_Gribbin/timetrav.htm http://www.npl.washington.edu/AV/altvw33.html [WebGal]
Its quite simple actually.Time is relative according to Einstein.So if you are in a space shuttle travelling at 1/2 the speed of light and had a 30 minute ride back home, you are in the future.But light has direction and so does time.So if you travel in a direction opposite for the same 30 minutes at 1/2 speed of light then you end up in the same time.you do this many times over you can see both the past and the future.The only hurdle for us is to reach 3,00,000 kms/sec speed for any machine. [gkrisiyer]
Tough your explanation sounds correct to some extent, iwold like to recommand you to read the various explanations given by various physicists explaning the reasons for the occuring of possibility of time travel. Their explanations also sound to be right and correct. [sreedhar]