Do you believe in time travelling?
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Why?
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It is possible to travel forward in time but not backwards.
Time, as we know is a man-made measurement, seconds, minutes, hours, etc. are all inventions of man, even days, months and years. Our day is not exactly 24 hours, our months have to be changed every four years with an extra day added to February, our year is longer than 365 days and getting longer. In fact, all our time measurements are wrong. Even out date is wrong. In the west we take our year from the date of the birth of Jesus, well that was in the year 6BC so our year should now be 2015 coming up to 2016, and new year should be in either April or September (depending on which historian you believe). So according to our calendar, we are already living in the future (or the past depending on how you look at it).
You see time is relative. It has been proved that the faster you travel, the slower time passes. So, in theory, if you go fast enough time should start going backwards. Well, of course that would mean going much faster than the speed of light, not very probable. But if you were to leave Earth on, say, 1st December 2009 and travel at very high speed through space for, what to you is, 20 years, on your return it could be 2129 here - but to you it is only 2029. You have therefore travelled into the future.
This phenomenon even works for speeds we can obtain now. If you travel across the Atlantic in a high speed jet, when you arrive, you will arrive a fraction of a second into the future. This has been done and measured with electronic timers that can measure tiny fluctuations in time. Why is this? Well, as time and space are one and the same (the so-called ?Space-time continuum?), as you travel faster, you ?bend? space slightly thereby bending time. This was discovered using Einstein?s theory which basically says that the faster you go, the more your mass will increase, and the more your mass increases, the more you will ?bend? space/time. So time is always relative to the individual person measuring it, their position in space and their speed.
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It is possible to travel forward in time but not backwards.
Time, as we know is a man-made measurement, seconds, minutes, hours, etc. are all inventions of man, even days, months and years. Our day is not exactly 24 hours, our months have to be changed every four years with an extra day added to February, our year is longer than 365 days and getting longer. In fact, all our time measurements are wrong. Even out date is wrong. In the west we take our year from the date of the birth of Jesus, well that was in the year 6BC so our year should now be 2015 coming up to 2016, and new year should be in either April or September (depending on which historian you believe). So according to our calendar, we are already living in the future (or the past depending on how you look at it).
You see time is relative. It has been proved that the faster you travel, the slower time passes. So, in theory, if you go fast enough time should start going backwards. Well, of course that would mean going much faster than the speed of light, not very probable. But if you were to leave Earth on, say, 1st December 2009 and travel at very high speed through space for, what to you is, 20 years, on your return it could be 2129 here - but to you it is only 2029. You have therefore travelled into the future.
This phenomenon even works for speeds we can obtain now. If you travel across the Atlantic in a high speed jet, when you arrive, you will arrive a fraction of a second into the future. This has been done and measured with electronic timers that can measure tiny fluctuations in time. Why is this? Well, as time and space are one and the same (the so-called ?Space-time continuum?), as you travel faster, you ?bend? space slightly thereby bending time. This was discovered using Einstein?s theory which basically says that the faster you go, the more your mass will increase, and the more your mass increases, the more you will ?bend? space/time. So time is always relative to the individual person measuring it, their position in space and their speed.
SO can we use worm holes to travel in time?
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Yes, if they really exist. But once again, only forward
http//news.yahoo.com/s/time/20091111/wl_time/08599193737000
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Every time i fall to sleep i'd fast-forward in time, does that count?
I guess not. laugh
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Yes, if they really exist. But once again, only forward
So if you travel forward are you stuck there forever since you can't go back in time?
If you are travelling faster than the speed of light, wouldn't you be in complete darkness until you slow down and light catches up with you?
And wouldn't the world have to travel at the same rate in order to exist in that world? ???
So you're stuck in darkness with nothing around you for the rest of your life? &
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So if you travel forward are you stuck there forever since you can't go back in time?
Yes
If you are travelling faster than the speed of light, wouldn't you be in complete darkness until you slow down and light catches up with you?
No you would still see light coming towards you from the direction you are travelling and "old" light from the sides
And wouldn't the world have to travel at the same rate in order to exist in that world? ???
Not if you were travelling towards it. If you were travelling away, you just wouldn't see it as it is
So you're stuck in darkness with nothing around you for the rest of your life? &
No, because you are assuming that you would be travelling at that speed for the rest of your life. You could slow down. Who knows what other things you might see that we can't see at the speed we are going now?
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No, because you are assuming that you would be travelling at that speed for the rest of your life. You could slow down.
If you slow down or even stop you will be moving at the same rate as the normal world except you are ahead by so many seconds/ minutes/hours/days.etc
Who knows what other things you might see that we can't see at the speed we are going now?
hmm maybe another world. could be identical to ours. creepy!
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Yer all mad! As you just approach the speed of light your mass increases dramatically so that at the speed of light it becomes infinite. That means you turn into a black hole and get all the life you've got left squished out of you! Never mind you'd have to find an infinite amount of energy just to accelerate up to the speed of light in the first place let alone trying to slow down again.
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Yer all mad! As you just approach the speed of light your mass increases dramatically so that at the speed of light it becomes infinite. That means you turn into a black hole and get all the life you've got left squished out of you! Never mind you'd have to find an infinite amount of energy just to accelerate up to the speed of light in the first place let alone trying to slow down again.
I think that theory isn't practical.
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Yer all mad! As you just approach the speed of light your mass increases dramatically so that at the speed of light it becomes infinite. That means you turn into a black hole and get all the life you've got left squished out of you! Never mind you'd have to find an infinite amount of energy just to accelerate up to the speed of light in the first place let alone trying to slow down again.
Using Einstein's theory that would be almost correct, but we were talking theoretically. In any event it is Einstein's theory that proves the bending of time/space and the distortion of time allowing a person to "effectively" travel forward in time.
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Salam,
In Quran, God says, we cannot stop death. We cannot postpone the exact time of death and even cannot expedite it.
Example, some people face death in his cosy bed. Some people did not die, even in dangerous car accident. Almighty God already set the time of our death to exact seconds.
So, in that regard, it's not possible in our lifetime to pull or push our time travel or tunnel. Example, we advice our friend not to drive fast. In few hours he met a tragic fatal accident. Why? We already advice him. It's just that he just follow the timeline towards death. Then we think, if I could call him at least 5 minutes before the accident, just to slow his car down. Well, we just cannot afford to do that. Proof, our life is full of why's? Why he's dead? Why he don't follow my advice?
Conclusion, we only pray to ALmighty God. He knows what's best for us. It seems that we cannot control our timeline as we control our Playstation 3.
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Yer all mad! As you just approach the speed of light your mass increases dramatically so that at the speed of light it becomes infinite. That means you turn into a black hole and get all the life you've got left squished out of you! Never mind you'd have to find an infinite amount of energy just to accelerate up to the speed of light in the first place let alone trying to slow down again.
So says conventional wisdom. On the other hand, subatomic particles can move significantly faster than the speed of light IF in a non-vacuum (Cherenkov radiation or photons moving through cesium vapor at 310x the speed of light come to mind). Some subatomic particles have measurable mass. Even if the mass is so minute to be unmeasurable, infinity times "very very small" equals infinity, amirite? If photons/light have no mass, then how can the attraction of light by the gravity of a black hole be explained? How can an object with momentum lack mass, especially considering the definition of momentum?! If the subatomic particles are moving "faster than the speed of light", then why do they lack infinite mass? On logical grounds alone, I dispute conventional wisdom in this matter.
There are no fixed laws in science, only the theory of the moment. I postulate that energy and space-time are related much as energy and matter are related. If true, properly focused energy could displace space-time (think flux capacitor from the movie "Back to the Future". The amount of energy in a watch battery (properly focused) could probably displace an amount of energy much smaller than the nucleus of an atom. To displace enough space-time to send a human would require an immense amount of energy. Further, the amount of energy required to displace space-time is surely enough to disassociate matter--to "transport" anything will require the severing of space-time around the person or object to be sent! Even if the aforementioned obstacles are overcome, control of the destination location and time ~seems~ to be insurmountable.
My take is that time travel may someday be possible, but it will probably never be practical. There are more pressing issues for technology to address.
peace
~Abdul-Hadi
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being able to go back in time, implies that you will introduce/create new energy in the past. This is ofcoase immpossible...
A valid point, but one which is true ONLY if our understanding of physics on this point is true. Why take anything for granted? How many scientific "laws" of the past are now disproven?
Even bearing in mind conservation of energy...what if the equivalent energy was transported "forward" at the same time as matter is transported "backward"? 100 units transported back, 100 units transported forward. Conservation of energy is not violated. As much as you can't have two objects in the same space at the same time, I see no reason for space-time to follow a different paradigm.
We simply don't know enough to say with certainty either way. For all we know, UFOs could be time machines!
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Here is the problem with "time travel";
The universe dies instant to instant, and it gets reborn like so (mentioned in quran, also a point of study in quantum mechanics). There is perhaps a single set of changes that define the difference between two instants. So this means the ONLY thing that exists is this moment now. The information about the past is all encoded in what we observe in the present moment.
Now to go back in time would require that you perhaps observed all the changes reversing themselves, and perfectly so. The problem with that is that all the changes that form a single forward step in time by nature have a probability of 1 in 1 occuring but as a direct result of that, the probability of all the changes reversing is 1 in infinity, i.e. 0.
In essence, ALLAH does not ever go back on his word, and for what reason should he? Letting us time travel back so we can eat that extra portion of chips with salad this time round, versus keeping all the zillions of stars balanced, be serious!
Now, as for photons moving faster than the speed of light, they don't. All matter obeys the speed limit of information, of which the speed of light is a direct result of. The phase velocity is allowed to exceed the speed of light because it's not a real speed in a sense, no information is transferred. The attraction of light is explained by the fact that black holes cause curvature of space around them.
There is something called a geodesic, which extends the concept of the shortest line between two points to any kind of space you think of. A black hole makes all the geodesics point into its event horizon and light as a particle always follows the nearest geodesic.
Having said that, there is a possible method that this could be possible. It's called the Alcubierre metric, look it up. If you flew away to the edge of space faster than light then looked back upon earth with some stupidly powerful telescope you could observe the past. However there is no changing the past once the light has made its decision. And remember that ALLAH is the light of the universe.