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 Posted: Sun May 27, 2007 4:50 pm
I learned that in science that if you travel at light speed you will move so fast that everything will stand still so you will move forward in time or something like that. I think it was the oppisite of that but anyway do you think that is possible?
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Posted: Sun May 27, 2007 5:35 pm
One of my science teachers said about the same. I think it could be possible to go fast enough to literally slow down time to a point while outside of that would go by at a normal pace.
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Posted: Sun May 27, 2007 5:57 pm
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Posted: Sun May 27, 2007 9:30 pm
(summery) in theory, if someone was at near-lightspeed, they'd come back barely aged, while time outside of their speed had progressed 'faster'.
Yeowch. Spend some time at near-lightspeed, and come back barely aged, while everyone you knew is older, potentially dead.
Time travel (classical time machine or the like) itself involves the fifth dimension... something we don't perceive really, if I remember my theoretical physics on the various dimensions properly. It would be rather... difficult to manage a time machine considering that we don't even manage to perceive the fourth dimension fully, instead we observe it from moment to moment...
Though if we actually perceived the fifth... well... seer, much? Being able to perceive a multitude of futures, which depend on so many things...
It'd probably drive someone insane. Interesting thought, though. ^_^
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Posted: Mon May 28, 2007 5:38 am
Well, it does seem a mystery. At first the relation be speed and time seemed irrelevant to me. However, it is said that all uniform motion was related. But the speed of light always remains the same no matter what their state of uniform linear motion is. Theory states after surpassing the speed of light, or with enough speed, we enter the state of acceleration at uniform speed surpassing the normal speed of time. Eitherway, making a time machine isn't that easy as a living body cannot sustain the pressure at the speed of light. Not much to say... Quote: Hefele and Keating, in 1971, flew cesium atomic clocks east and west around the Earth in commercial airliners, to compare the elapsed time against that of a clock that remained at the US Naval Observatory. Two opposite effects came in to play. The clocks were expected to age more quickly (show a larger elapsed time) than the reference clock, since they were in a higher (weaker) gravitational potential for most of the trip (c.f. Pound, Rebka). But also, contrastingly, the moving clocks were expected to age more slowly because of the speed of their travel. The gravitational effect was the larger, and the clocks suffered a net gain in elapsed time. To within experimental error, the net gain was consistent with the difference between the predicted gravitational gain and the predicted velocity time loss. In 2005, the National Physical Laboratory in the United Kingdom, report their limited replication of this experiment. The NPL experiment differed from the original in that the cesium clocks were sent on a shorter trip (London-Washingon D. C. return), but the clocks were more accurate. The reported results are within 4% of the predictions of relativity. Hope this helps. And yes, there is a speed faster than the speed of light. XD Anyone for black holes? hehe
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Posted: Mon May 28, 2007 9:17 am
Black holes aren't faster than the speed of light. What you are thinking of is the escape velocity from a black hole is faster than the speed of light. That is why light can escape.
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Posted: Mon May 28, 2007 10:53 am
zakhiyu Well, it does seem a mystery. At first the relation be speed and time seemed irrelevant to me. However, it is said that all uniform motion was related. But the speed of light always remains the same no matter what their state of uniform linear motion is. Theory states after surpassing the speed of light, or with enough speed, we enter the state of acceleration at uniform speed surpassing the normal speed of time. Eitherway, making a time machine isn't that easy as a living body cannot sustain the pressure at the speed of light. Not much to say... Quote: Hefele and Keating, in 1971, flew cesium atomic clocks east and west around the Earth in commercial airliners, to compare the elapsed time against that of a clock that remained at the US Naval Observatory. Two opposite effects came in to play. The clocks were expected to age more quickly (show a larger elapsed time) than the reference clock, since they were in a higher (weaker) gravitational potential for most of the trip (c.f. Pound, Rebka). But also, contrastingly, the moving clocks were expected to age more slowly because of the speed of their travel. The gravitational effect was the larger, and the clocks suffered a net gain in elapsed time. To within experimental error, the net gain was consistent with the difference between the predicted gravitational gain and the predicted velocity time loss. In 2005, the National Physical Laboratory in the United Kingdom, report their limited replication of this experiment. The NPL experiment differed from the original in that the cesium clocks were sent on a shorter trip (London-Washingon D. C. return), but the clocks were more accurate. The reported results are within 4% of the predictions of relativity. Hope this helps. And yes, there is a speed faster than the speed of light. XD Anyone for black holes? hehe So when we travel places around the world it affects our aging - even though minutely??? arrow I like to think that all things are possible. There was a time that people thought flying was impossible. When you look back at only the past 100 years -What do we have now that our grand parents or great grandparents didn't have??? Televisions - Computers... rofl
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Posted: Tue May 29, 2007 1:04 am
There are several things that would happen if it were possible to travel at the speed of light, according to Einstein's Special Theory of Relativity.
1. Time Dilation
As you approach the speed of light, time would be ticking over slower for you, so you would perceive the universe running faster than usual. At the speed of light time would stop for you. The universe would expand and cool and all the stars would wink out and the big ones would turn into black holes which would evaporate all in an instant. So when you stopped, you'd be a bit lonely.
2. Energy use
Acceleration requires energy. The more you accelerate, the more energy you need. To accelerate matter (any matter - you, a spaceship, an individual atom) to the speed of light would require infinite energy. If all the matter in the universe was converted into energy (E=MC^2) and added to all the spare heat and light hanging around, this still wouldn't be enough energy to accelerate a single atom to the speed of light.
3. Mass increase.
The faster you go, the heavier you get. You don't notice it in a jet or anything like that because even jets are seriously slow compared to the speed of light. As you approach the speed of light, your mass increases exponentially. If it were possible to accelerate a single atom to the speed of light, it's mass would be infinite. Something with infinite mass would curve space infinitely deeply (it would have an infinitely strong gravitational pull), so everything in the universe would accelerate towards it infinitely quickly, or at least they would if you hadn't converted everything into energy to get the atom to light speed in the first place!
So yeah, there are weird effect if you could travel at light speed, but seeing as how there is not enough energy in the universe to actually do it, it's not very likely to happen. And seeing as how, if you did, you would actually cause the destruction of the entire universe, it would be a bad idea too.
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Posted: Tue May 29, 2007 4:49 am
Akira Seki Black holes aren't faster than the speed of light. What you are thinking of is the escape velocity from a black hole is faster than the speed of light. That is why light can escape. Lol, I wasn't saying Black Holes were faster than the speed of light. Use common sense, mate! Quote: The faster you go, the heavier you get. You don't notice it in a jet or anything like that because even jets are seriously slow compared to the speed of light. As you approach the speed of light, your mass increases exponentially. If it were possible to accelerate a single atom to the speed of light, it's mass would be infinite. Something with infinite mass would curve space infinitely deeply (it would have an infinitely strong gravitational pull), so everything in the universe would accelerate towards it infinitely quickly, or at least they would if you hadn't converted everything into energy to get the atom to light speed in the first place! Exactly! However, there is a limit to acceleration of any mass.
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Posted: Wed May 30, 2007 9:55 pm
In a Christian point using science,I say no if you are talking about time travel.Such as going to the future.Reasoning behind this is that I seriously doubt there is one of me that is grown and has kids.God made one of me!Not two so I could go see myself.
Now such as going light-speed and going to so fast it seems that it takes hours for someone to move,and a second to go around the state,yes.I say no.I mean just because you go so fast doesnt mean that times slows down for you.To me in my personal oppoin,well let me say this.Have any of you seen Justic League.I still like it.So get over it,but any ways.Flash the super hero with speed,in one episode he falls a sleep.This is when this man escapes and start s to make the Justic League's dream horrible and they all almost die.But any way,in Flash's dream he makes it seem as if Flash is going so fast that basically time stops for him.Flash says"It will take your whole life time for you to tie your shoe,when it takes a second for me to take a walk"Or something around those lines.Well I think thats just cartoons.In real life,when a rocket shoots off its going really fast.I dont know the specific speed.Any way it doesnt slow us down does it?A race care speeds around a race track,your tying you shoe,by the time the race car is passing you again,your still tying it.Well maybe your O.C.D,and your shoes must be perfect.What happens if your just slow at doing things.Race car passes your drinking a drink.It passes five times and your still drinking.Well just because it has pass five times,doesnt mean time has slow down.It takes me 10-15 minutes to drink a whole can of root beer.It just means your not trying to choke on the drink.Did that make any scence?Now I havnt researched time travel or light speed traveling,so proove me wrong.It doesnt matter if I make misstakes.I am glad I do,I learn from those and challenge it again!
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Posted: Thu May 31, 2007 1:38 am
taru-san In a Christian point using science,I say no if you are talking about time travel.Such as going to the future.Reasoning behind this is that I seriously doubt there is one of me that is grown and has kids.God made one of me!Not two so I could go see myself. Now such as going light-speed and going to so fast it seems that it takes hours for someone to move,and a second to go around the state,yes.I say no.I mean just because you go so fast doesnt mean that times slows down for you.To me in my personal oppoin,well let me say this.Have any of you seen Justic League.I still like it.So get over it,but any ways.Flash the super hero with speed,in one episode he falls a sleep.This is when this man escapes and start s to make the Justic League's dream horrible and they all almost die.But any way,in Flash's dream he makes it seem as if Flash is going so fast that basically time stops for him.Flash says"It will take your whole life time for you to tie your shoe,when it takes a second for me to take a walk"Or something around those lines.Well I think thats just cartoons.In real life,when a rocket shoots off its going really fast.I dont know the specific speed.Any way it doesnt slow us down does it?A race care speeds around a race track,your tying you shoe,by the time the race car is passing you again,your still tying it.Well maybe your O.C.D,and your shoes must be perfect.What happens if your just slow at doing things.Race car passes your drinking a drink.It passes five times and your still drinking.Well just because it has pass five times,doesnt mean time has slow down.It takes me 10-15 minutes to drink a whole can of root beer.It just means your not trying to choke on the drink.Did that make any scence?Now I havnt researched time travel or light speed traveling,so proove me wrong.It doesnt matter if I make misstakes.I am glad I do,I learn from those and challenge it again! Relativistic effects (weird stuff that happens at high speeds) are only really noticeable at VERY high speeds, like nearly the speed of light. The speed of light is roughly 300,000 kilometres per second. PER SECOND!! Your race car is barely moving in comparison! Relativistic effects have been proven many times. One example is where a radioactive isotope was accelerated in a particle accelerator. Radioactive isotopes of a particular type decay into radiation at a particular rate. This rate is always the same for that particular isotope type. However, the particle in the accelerator, after being speed up to a high fraction of light speed, took longer to decay! Other experiments have been performed with caesium (sp?) clocks on jets being compared to clocks on the ground. The time dilation effects of high speed travel are relative, not absolute. Just because time is travelling slower for the high speed traveller, that does not mean it travels faster for everyone else. Its just that when the traveller stops, more time has passed than he has experienced.
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Posted: Fri Jun 01, 2007 3:28 pm
Worm of Morgoth taru-san In a Christian point using science,I say no if you are talking about time travel.Such as going to the future.Reasoning behind this is that I seriously doubt there is one of me that is grown and has kids.God made one of me!Not two so I could go see myself. Now such as going light-speed and going to so fast it seems that it takes hours for someone to move,and a second to go around the state,yes.I say no.I mean just because you go so fast doesnt mean that times slows down for you.To me in my personal oppoin,well let me say this.Have any of you seen Justic League.I still like it.So get over it,but any ways.Flash the super hero with speed,in one episode he falls a sleep.This is when this man escapes and start s to make the Justic League's dream horrible and they all almost die.But any way,in Flash's dream he makes it seem as if Flash is going so fast that basically time stops for him.Flash says"It will take your whole life time for you to tie your shoe,when it takes a second for me to take a walk"Or something around those lines.Well I think thats just cartoons.In real life,when a rocket shoots off its going really fast.I dont know the specific speed.Any way it doesnt slow us down does it?A race care speeds around a race track,your tying you shoe,by the time the race car is passing you again,your still tying it.Well maybe your O.C.D,and your shoes must be perfect.What happens if your just slow at doing things.Race car passes your drinking a drink.It passes five times and your still drinking.Well just because it has pass five times,doesnt mean time has slow down.It takes me 10-15 minutes to drink a whole can of root beer.It just means your not trying to choke on the drink.Did that make any scence?Now I havnt researched time travel or light speed traveling,so proove me wrong.It doesnt matter if I make misstakes.I am glad I do,I learn from those and challenge it again! Relativistic effects (weird stuff that happens at high speeds) are only really noticeable at VERY high speeds, like nearly the speed of light. The speed of light is roughly 300,000 kilometres per second. PER SECOND!! Your race car is barely moving in comparison! Relativistic effects have been proven many times. One example is where a radioactive isotope was accelerated in a particle accelerator. Radioactive isotopes of a particular type decay into radiation at a particular rate. This rate is always the same for that particular isotope type. However, the particle in the accelerator, after being speed up to a high fraction of light speed, took longer to decay! Other experiments have been performed with caesium (sp?) clocks on jets being compared to clocks on the ground. The time dilation effects of high speed travel are relative, not absolute. Just because time is travelling slower for the high speed traveller, that does not mean it travels faster for everyone else. Its just that when the traveller stops, more time has passed than he has experienced. Well thank you for teaching me something new ^^
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Posted: Sat Jun 02, 2007 7:18 am
I DO NOT beleive in time travel - for two reasons. First is my scientific reason: Time dilation causes time to pass more slowly for objects traveling at velocities near the speed of light. This phenomenon has been scientifically measured as was mentioned earlier. However, as I see it, there is no reason to assume that this is related to time travel in any way. The point is we can observe the clocks traveling at high speeds as slowing down. The key word here is observe. Though ticking more slowly, the clock never ceases to exist at the same time as the rest of the universe. It just ticks more slowly - it doesn't dissapear like the De Lorean from the Back to the Future movies. This brings me to my second reason, which is admittedly philisophical/spiritual in nature. Echoing what Radioactive Mud said, I believe that there is only one of me. I do not believe that other versions of myself exist either in other times - past or future - or in any parallel universes. Basically if another me existed I'd know it because it would have the same consciousness as me. This involves the collapse of the quantum wave. I believe that consciousness (I believe in God and souls by the way) collapses the quantum wave and requires reality to coelesce into a single tangible reality. In the absence of a conscious presence, the universe takes a quantum wave form. For one last thought on time travel, considering my thoughts above, I imagine that if time travel is possible it would be much like traveling in space (some scientists believe that time is another dimension just like the three spatial dimensions). Traveling through space of course I can go someplace I have been before, but I am not still there to meet myself. Likewise if I will return to a place in the future there is not an older, wiser me there to give me guidance. Similarly I don't think that if I traveled into the past or future I would be then. I think that if we traveled in time we find that the past or future is void, either we left already or haven't gotten there yet. In this regard the Time Travel fiction that most resemble the way I think it would really work is Stephen King's The Langoliers. If you haven't read it or seen the movie of it, you can read about it here. Yes it's another Wikipedia link, but who doesn't love Wikipedia?
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Posted: Sat Jun 02, 2007 6:48 pm
I just had kinda a weird thought on this subject. You can travel in space easily enough, yes? For instance, you can walk to the local shops, and back home. You can even return to the same place: you walk to the same shops on the next day. So you are in the same space, but you can't see another one of you because the time is different. Obvious, yes?
Well maybe time travel would be similar, but reversed. We might be able to travel to a different time, but it could never be the same space. Let's use the Back To The Future Delorean as an example. In 1985, McFly dials in 1955 on his dashboard, speeds up to 55MPH, and back he goes. But how did the Delorean know where to go? The Earth is not in the same spatial position it was then. The Earth orbits the sun, the sun orbits the Milky Way's central black hole, the Milky Way orbits the centre of gravity of the Local Cluster, etc. etc.
So the Delorean may have travelled through time, but it would reappear in some dark cold region of space, where the Earth would be in 1985. So Back To The Future would have been a (mercifully) shorter and more grisly movie.
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Posted: Sun Jun 03, 2007 6:56 pm
Gotta get myself into it.
Gotta get myself into it.
Gotta get myself into it. To go faster than the speed of light, you'll need more than infinite energy. Why not help me do it?
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