OP
SE><IE
Guest
Re: UFOs, Aliens, Time Travel and more...
This means that human eye is insensible to speeds greater than light. *whew*
This means that human eye is insensible to speeds greater than light. *whew*
Do UFOs/Aliens exist, is Time Travel possible and more...
OP
krazyfrog
Guest
Re: UFOs, Aliens, Time Travel and more...
After reading all those posts it seems that time travel would indeed be possible. But for someone to travel time, they would require a TIME MACHINE (like the ones shown in movies). So can anyone tell me what does a time machine has to do to send a person back and forth in time. In short could someone please EXPLAIN THE CONSTRUCTION AND WORKING OF TIME MACHINE. And if not a time machine then what will be used to send a person back and forth in time?
After reading all those posts it seems that time travel would indeed be possible. But for someone to travel time, they would require a TIME MACHINE (like the ones shown in movies). So can anyone tell me what does a time machine has to do to send a person back and forth in time. In short could someone please EXPLAIN THE CONSTRUCTION AND WORKING OF TIME MACHINE. And if not a time machine then what will be used to send a person back and forth in time?
blackpearl
The Devil
Re: UFOs, Aliens, Time Travel and more...
^^ Raaabo already explained, one basic requirement to travel back in tim is to travel at speeds greater than the velocity of light. So a time machine, I guess, would be a just such a vehicle.
^^ Raaabo already explained, one basic requirement to travel back in tim is to travel at speeds greater than the velocity of light. So a time machine, I guess, would be a just such a vehicle.
Kiran.dks
Technomancer
Re: UFOs, Aliens, Time Travel and more...
Nope. Sorry Raaabo, I can't accept this! Let me explain...
Train is approaching at a speed more than speed of light. I said 5 times the light speed, which is very high. Since it is approaching the person, that means distance is reducing w.r.t time. The light released by the headlight is still travelling at the speed of light which is less than the speed of train. So light released at a time 't' during the travel will reach the person much later than the train in itself. Train will be seen earlier becoz the train is approaching him. Of course the headlight is still seen along with train, but what I said is headlight will be seen even after the train passes through. 5 times light speed is specified for this reason. Might be the difference would have been less if the speed is just slightly higher, not 5 times.
Raaabo said:
Nope. Sorry Raaabo, I can't accept this! Let me explain...
Train is approaching at a speed more than speed of light. I said 5 times the light speed, which is very high. Since it is approaching the person, that means distance is reducing w.r.t time. The light released by the headlight is still travelling at the speed of light which is less than the speed of train. So light released at a time 't' during the travel will reach the person much later than the train in itself. Train will be seen earlier becoz the train is approaching him. Of course the headlight is still seen along with train, but what I said is headlight will be seen even after the train passes through. 5 times light speed is specified for this reason. Might be the difference would have been less if the speed is just slightly higher, not 5 times.
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OP
SE><IE
Guest
Re: UFOs, Aliens, Time Travel and more...
@Kiran: Looks like you are considering the speed of light and train as conventional objects. so you see the faster one earlier and then the slower one. If this were to happen then the whole purpose of FTL would have been solved by directly moving at more than light's speed. I don't think FTL is possible by conventional methods though
@raaabo: The avie really suits you. I can see the HDR effect
okey, here's how to design a time-machine:
@Kiran: Looks like you are considering the speed of light and train as conventional objects. so you see the faster one earlier and then the slower one. If this were to happen then the whole purpose of FTL would have been solved by directly moving at more than light's speed. I don't think FTL is possible by conventional methods though
@raaabo: The avie really suits you. I can see the HDR effect
okey, here's how to design a time-machine:
Archanid (Skoar!) said:
Re: UFOs, Aliens, Time Travel and more...
The theory of time travel is weird. As per existing theories, time travel to the future is very possible. Though time travel to the past is not. I'll keep the explanations simple, and am not going to use equations and stuff, so that everyone gets it (I hope)!
Time Travel To The Future
This one is easy! Well, comparatively anyway... Researchers have already proven, using popular experiments that you can Google for, that traveling to the future is easy. All you have to do is travel at speeds comparable to light. The important thing to know here is that light speed is not possible at all right now, but comparable speeds certainly are. What are these speeds? Say, C/2! Or even C/100! Let's stick with C/2 (or half the speed of light) for this example.
Let's say you have this über-cool spaceship that can attain speeds of half the speed of light. We will ignore the time taken to accelerate to that speed, or the time taken to decelerate...
Bodies in motion experience what is known as relative time, i.e., the time that a body experiences is different from rest time. This has been proven by syncing two atomic clocks, placing one on the ground and the other in a really fast moving fighter jet / rocket (I forget which). After hours of zipping about at the vehicles top speed it was found that the clock on the ground was a second faster than the one zipping about in the vehicle. Why? Because if you were to travel at light speed, time = 0 (or time comes to a standstill). You can find all the equations that prove this online. And remember, this was just jet planes / rockets, which travel at just a negligible fraction of the speed of light
Now, imagine that you were traveling at C/2, time would really slow down then. Though not exactly correct, let us assume for the sake of example and ease of calculation that relative time slowed to 1/2 of absolute time at a speed of C/2.
You get on to your über cool rocket, you hit the speed of C/2, and travel for one year in a direction away from Earth. Then you turn around, and take another year to come back. You left in 2008, Earth time, and return at what you think is 2010. You find that it's actually 2012 on Earth, because time was moving at double the speed on Earth! Congratulations, you have just traveled 2 years into the future!
Time Travel To The Past
This is a little more complicated because it involves faster than light travel, which is not even possible in theory right now. Well, according to most theories anyway! Let’s assume that you could now travel at 2C (twice the speed of light), and let’s also assume for simplicity that time at C =0 then time at 2C = -t (or that you end up traveling back into the past the same duration that you travel).
Use the same scenario as the future: you travel at 2C for a year away, and then at 2C for a year back. In your time, you have traveled 2 years, left at 2008 and return at 2010 your time, but you find that on earth, it’s 2006!
Of course many people claim that this is just not possible. Theories claim that you will actually end up 2 years older, but end up back at the time you left ( 2008 ). So relatively, you’re in the past (2 years ago), but from Earth’s timeframe, you just never left!
Another theory is that you an see the events of the past, but never interact with them. Let’s say you have a really powerful telescope that can see distances of light years away. Now you travel at 2C for a year and stop. You are 2 light years away from Earth. You use your telescope to see what’s happening on earth, and instead of seeing what happening on Earth a year ago when you left (since light takes 2 years to travel to where you are, you took only 1 year) you see what is happening 1 year before you left! You have seen the past!
People often ask if time travel to the past were possible, even 10,000 years from now, where are all the time travelers? One theory suggests that in order to avoid a paradoxical situation, time travel is only possible to the past until the time machine existed, not before. But if you make a time machine, and it can’t travel to the past, how do you know it works? How do you test it?
The most plausible possibility to visit the past is superluminal (faster than light) travel. Even then, travelers might only look at the past, not interact with it, because as soon as they reduce speed to less than light speed they start moving forward in time from the reference point they left (our future).
Is this why we see UFOs? Maybe they’re not aliens at all, but just our future human explorers setting off for far away galaxies using faster than light travel. Since they travel faster than light, they appear (to themselves) to be traveling back in time… let’s take an example, in the year 3000, a ship leaves Earth, it ascends through the atmosphere into space, then starts accelerating and hits C very quickly, then it accelerates even further, to say 1000 C for a year. During this time, the pilot sees himself traveling back in time to his rest point, then sees the Earth go backwards in time a thousand years. Now, since he took off at, say Area 51, there is a possibility that when he accelerates to 1000C from C, almost instantaneously, people from 1000 years ago (year 2000) see an image of him, because he can see them. Is this what UFOs are? When he reaches his destination, he will slow down, and as a result disappear from the year 2000. Is this why UFOs suddenly appear and then disappear?
Or maybe it’s none of that, and UFOs are populated by humans from the future, who have been warned not to mess with the space time continuum, and thus cannot land and chat with us. They can see us, but not talk to us. Are the abductions we hear about actually rogue criminals from the future trying to change history to suit themselves?
As you can see, it’s all vague and guesswork when it comes to traveling to the past, the future, however, is fair game.
A sci-fi book I read once (don’t remember the name), told of the first near-light speed travelers. They set off in a ship that attained 0.8 x C, traveled for decades (in their time) to try and get to Andromeda. They reached there, and found that humans had already populated planets in Andromeda. In fact, technology had advanced, and humans attained C and were thriving on planets in Andromeda for centuries. At 0.8 x C, what was a few decades to the travelers was in fact a thousand years to people on Earth. The Captain of the ship finds that his own children were the pioneers of light speed travel, and reached Andromeda at C about 500 years before he did. They were dead and gone, and he met his great-great-great-grandchildren! He was 30 years older, but arrived at Andromeda 1000 years (Earth time) later! Travel to the future!
I know it’s hard to understand. But you have to accept the theories put across by the greatest minds on Earth, after all these are their theories, not mine. Let me explain how:
First let me explain why the observer standing still will always see the train and the headlight, and never either one.
What you see is light, which travels at C (light speed constant). You are unable to see anything that moves faster than light. Even if the train was traveling at 5C, all you will see is the train (providing you have a camera or eyes with a refresh rate / shutter speed of 1/C or lower) moving at the speed of light, never faster. Yes, you will see the train when it is actually very, very far away, and has gone past much before you saw it, but you will see both the train and it’s headlights. Why? Because you are only seeing at the speed of light. The time the train takes to pass you is negligible, and you will obviously not see the headlights or train once it has gone past. See diagram:
*raaabo.com/time1.jpg
Now remember, what the observer sees is light that travels at the speed of light. Not faster, not slower. So you see a train that is traveling at the speed of light, as light actually. Similarly, you see the headlight as light. Therefore both will be seen coming together, and both will be seen leaving together. In reality what you will see is just a flash of light switching on and off (coming and going past you).
Let’s look at another example: A train traveling faster than the speed of sound, and blowing its horn… You will see it go past you, then you will hear a sonic boom and hear the train and its horn after it has already passed you. This is what you are thinking is the case with light, which isn’t. Simply because anything that is faster than light is just not observable by us, while we can observe what is faster than sound, simply because we can see light.
Just as we cannot hear faster than sound, we cannot see faster than light. And before you think about asking whether you will feel the rush of air an hour before you see the train traveling past you, think again.
You only feel the rush of air when a train is near you. You can only see a certain distance away. The speed of light negates all of these distances because it is so great. You will always see something before you hear it or feel it. As in the diagram below, you can only see the train a certain distance away, and until it passes you. The ways you see the train are: light reflected from it and its headlights. In the diagram below, the first case (top) is where you will spot the train, the last (bottom) is where it goes out of sight.
*raaabo.com/time2.jpg
Though in reality the time difference is negligible, so you will only see a light flash, let’s say you have amazing eyesight, and can perceive things on a scale of light speeds (not greater). You will see the train approach, with headlights, and see it leave, with headlights… again, simply because the train may be traveling faster than the speed of light, but all you can see at is light speed!
There is complicated mathematics at play here and I suggest you see *en.wikipedia.org/wiki/Velocity_addition_formula, for more details.
Using this you can calculate that the velocity relative to the observer is always C or less than C, but never greater.
I hope it’s clear now, because, as you can see from my post, I’m having trouble trying to explain it in simple terms!
Raaabo
PS: Forgive the crappy images, I'm no artist
The theory of time travel is weird. As per existing theories, time travel to the future is very possible. Though time travel to the past is not. I'll keep the explanations simple, and am not going to use equations and stuff, so that everyone gets it (I hope)!
Time Travel To The Future
This one is easy! Well, comparatively anyway... Researchers have already proven, using popular experiments that you can Google for, that traveling to the future is easy. All you have to do is travel at speeds comparable to light. The important thing to know here is that light speed is not possible at all right now, but comparable speeds certainly are. What are these speeds? Say, C/2! Or even C/100! Let's stick with C/2 (or half the speed of light) for this example.
Let's say you have this über-cool spaceship that can attain speeds of half the speed of light. We will ignore the time taken to accelerate to that speed, or the time taken to decelerate...
Bodies in motion experience what is known as relative time, i.e., the time that a body experiences is different from rest time. This has been proven by syncing two atomic clocks, placing one on the ground and the other in a really fast moving fighter jet / rocket (I forget which). After hours of zipping about at the vehicles top speed it was found that the clock on the ground was a second faster than the one zipping about in the vehicle. Why? Because if you were to travel at light speed, time = 0 (or time comes to a standstill). You can find all the equations that prove this online. And remember, this was just jet planes / rockets, which travel at just a negligible fraction of the speed of light
Now, imagine that you were traveling at C/2, time would really slow down then. Though not exactly correct, let us assume for the sake of example and ease of calculation that relative time slowed to 1/2 of absolute time at a speed of C/2.
You get on to your über cool rocket, you hit the speed of C/2, and travel for one year in a direction away from Earth. Then you turn around, and take another year to come back. You left in 2008, Earth time, and return at what you think is 2010. You find that it's actually 2012 on Earth, because time was moving at double the speed on Earth! Congratulations, you have just traveled 2 years into the future!
Time Travel To The Past
This is a little more complicated because it involves faster than light travel, which is not even possible in theory right now. Well, according to most theories anyway! Let’s assume that you could now travel at 2C (twice the speed of light), and let’s also assume for simplicity that time at C =0 then time at 2C = -t (or that you end up traveling back into the past the same duration that you travel).
Use the same scenario as the future: you travel at 2C for a year away, and then at 2C for a year back. In your time, you have traveled 2 years, left at 2008 and return at 2010 your time, but you find that on earth, it’s 2006!
Of course many people claim that this is just not possible. Theories claim that you will actually end up 2 years older, but end up back at the time you left ( 2008 ). So relatively, you’re in the past (2 years ago), but from Earth’s timeframe, you just never left!
Another theory is that you an see the events of the past, but never interact with them. Let’s say you have a really powerful telescope that can see distances of light years away. Now you travel at 2C for a year and stop. You are 2 light years away from Earth. You use your telescope to see what’s happening on earth, and instead of seeing what happening on Earth a year ago when you left (since light takes 2 years to travel to where you are, you took only 1 year) you see what is happening 1 year before you left! You have seen the past!
People often ask if time travel to the past were possible, even 10,000 years from now, where are all the time travelers? One theory suggests that in order to avoid a paradoxical situation, time travel is only possible to the past until the time machine existed, not before. But if you make a time machine, and it can’t travel to the past, how do you know it works? How do you test it?
The most plausible possibility to visit the past is superluminal (faster than light) travel. Even then, travelers might only look at the past, not interact with it, because as soon as they reduce speed to less than light speed they start moving forward in time from the reference point they left (our future).
Is this why we see UFOs? Maybe they’re not aliens at all, but just our future human explorers setting off for far away galaxies using faster than light travel. Since they travel faster than light, they appear (to themselves) to be traveling back in time… let’s take an example, in the year 3000, a ship leaves Earth, it ascends through the atmosphere into space, then starts accelerating and hits C very quickly, then it accelerates even further, to say 1000 C for a year. During this time, the pilot sees himself traveling back in time to his rest point, then sees the Earth go backwards in time a thousand years. Now, since he took off at, say Area 51, there is a possibility that when he accelerates to 1000C from C, almost instantaneously, people from 1000 years ago (year 2000) see an image of him, because he can see them. Is this what UFOs are? When he reaches his destination, he will slow down, and as a result disappear from the year 2000. Is this why UFOs suddenly appear and then disappear?
Or maybe it’s none of that, and UFOs are populated by humans from the future, who have been warned not to mess with the space time continuum, and thus cannot land and chat with us. They can see us, but not talk to us. Are the abductions we hear about actually rogue criminals from the future trying to change history to suit themselves?
As you can see, it’s all vague and guesswork when it comes to traveling to the past, the future, however, is fair game.
A sci-fi book I read once (don’t remember the name), told of the first near-light speed travelers. They set off in a ship that attained 0.8 x C, traveled for decades (in their time) to try and get to Andromeda. They reached there, and found that humans had already populated planets in Andromeda. In fact, technology had advanced, and humans attained C and were thriving on planets in Andromeda for centuries. At 0.8 x C, what was a few decades to the travelers was in fact a thousand years to people on Earth. The Captain of the ship finds that his own children were the pioneers of light speed travel, and reached Andromeda at C about 500 years before he did. They were dead and gone, and he met his great-great-great-grandchildren! He was 30 years older, but arrived at Andromeda 1000 years (Earth time) later! Travel to the future!
Kiran_tech_mania said:
I know it’s hard to understand. But you have to accept the theories put across by the greatest minds on Earth, after all these are their theories, not mine. Let me explain how:
First let me explain why the observer standing still will always see the train and the headlight, and never either one.
What you see is light, which travels at C (light speed constant). You are unable to see anything that moves faster than light. Even if the train was traveling at 5C, all you will see is the train (providing you have a camera or eyes with a refresh rate / shutter speed of 1/C or lower) moving at the speed of light, never faster. Yes, you will see the train when it is actually very, very far away, and has gone past much before you saw it, but you will see both the train and it’s headlights. Why? Because you are only seeing at the speed of light. The time the train takes to pass you is negligible, and you will obviously not see the headlights or train once it has gone past. See diagram:
*raaabo.com/time1.jpg
Now remember, what the observer sees is light that travels at the speed of light. Not faster, not slower. So you see a train that is traveling at the speed of light, as light actually. Similarly, you see the headlight as light. Therefore both will be seen coming together, and both will be seen leaving together. In reality what you will see is just a flash of light switching on and off (coming and going past you).
Let’s look at another example: A train traveling faster than the speed of sound, and blowing its horn… You will see it go past you, then you will hear a sonic boom and hear the train and its horn after it has already passed you. This is what you are thinking is the case with light, which isn’t. Simply because anything that is faster than light is just not observable by us, while we can observe what is faster than sound, simply because we can see light.
Just as we cannot hear faster than sound, we cannot see faster than light. And before you think about asking whether you will feel the rush of air an hour before you see the train traveling past you, think again.
You only feel the rush of air when a train is near you. You can only see a certain distance away. The speed of light negates all of these distances because it is so great. You will always see something before you hear it or feel it. As in the diagram below, you can only see the train a certain distance away, and until it passes you. The ways you see the train are: light reflected from it and its headlights. In the diagram below, the first case (top) is where you will spot the train, the last (bottom) is where it goes out of sight.
*raaabo.com/time2.jpg
Though in reality the time difference is negligible, so you will only see a light flash, let’s say you have amazing eyesight, and can perceive things on a scale of light speeds (not greater). You will see the train approach, with headlights, and see it leave, with headlights… again, simply because the train may be traveling faster than the speed of light, but all you can see at is light speed!
There is complicated mathematics at play here and I suggest you see *en.wikipedia.org/wiki/Velocity_addition_formula, for more details.
Using this you can calculate that the velocity relative to the observer is always C or less than C, but never greater.
I hope it’s clear now, because, as you can see from my post, I’m having trouble trying to explain it in simple terms!
Raaabo
PS: Forgive the crappy images, I'm no artist
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OP
SE><IE
Guest
Re: UFOs, Aliens, Time Travel and more...
Whoa!! Impressive.
Okey, I got it. You can't see anything faster than light because light itself is needed to be reflected off from the object which (light) can't travel more than C.
Its pretty similar to sound, you can't hear anything if it travels at speeds exceeding those of sound. But you can see (say, a plane) cuz you were using a faster sensory organ (eyes).
Consider the case of a blind person. Can he distinguish between sonic and super-sonic velocities? No.
Similarly we can't distinguish between at-light's-speed and FTL-speed.
Hope you got it
Whoa!! Impressive.
Okey, I got it. You can't see anything faster than light because light itself is needed to be reflected off from the object which (light) can't travel more than C.
Its pretty similar to sound, you can't hear anything if it travels at speeds exceeding those of sound. But you can see (say, a plane) cuz you were using a faster sensory organ (eyes).
Consider the case of a blind person. Can he distinguish between sonic and super-sonic velocities? No.
Similarly we can't distinguish between at-light's-speed and FTL-speed.
Hope you got it
Re: UFOs, Aliens, Time Travel and more...
I should pay more attention to this thread, some very interesting topics being discussed. It's a nice read!
@Raaabo: Very informative post, this last one.
I'm going to save myself from googling and instead post my doubt here instead. (Apologies, if they've been addressed before)
It's all very exciting to explore the theory behind high-speed, space & time travelling. But how practical is it? To be more precise, what are the physiological side-effects of high-speed travels on the human body and mind? Have we overcome this hurdle, or is work underway?
--------
I will talk now a bit on UFOs and aliens, people who claim they've seen them (UFOs in general). In particular those who claim they've made physical contact(as in seeing an alien being) and those who claim to have been abducted by them. And this is all based on a documentary on NGC that I'd watched some time back; will try to recollect as much as I can.
There is a stereotype involved in most of the abductees' explanation of events as they unfolded, based on researched data, and it always revolves around the subject waking up from sleep, finding their room illuminated by a bright light, seeing 'figures' in their vicinity; the subject is unable to move and feels paralyzed and then the subject gets 'abducted'.
As far as I can remember, clinical procedures in Japan had proved that this is all a scenario of dream-induced stupor by brain mapping. In this hyperactive state, people often dream of various things and find themselves doing various activities, walking not the least of them. The brain actually 'switches off' the region that is responsible for controlling motor functions of the body so the person who's dreaming doesn't actually get up and start 'living his dream'. But sometimes, in those rare instances, it forgets to 'switch on' the region back to normal once the dreaming bit is over. People suffer temporary paralysis in this state and the resulting experiences (re: bright light, figures in vicinity, etc.) are other 'side-effects'. Also there was an indication that abductees those who've gone for therapy, have explained their experiences pertaining to specific questions in a hypnotized state asked by the shrink. This questioning and the cues of those questions is what's supposed to have made them believe what they believe in the first place.
I'm not doing justice to this little commentary by recalling only bits and pieces of the documentary, for which I apologize.
I should pay more attention to this thread, some very interesting topics being discussed. It's a nice read!
@Raaabo: Very informative post, this last one.
I'm going to save myself from googling and instead post my doubt here instead. (Apologies, if they've been addressed before)
It's all very exciting to explore the theory behind high-speed, space & time travelling. But how practical is it? To be more precise, what are the physiological side-effects of high-speed travels on the human body and mind? Have we overcome this hurdle, or is work underway?
--------
I will talk now a bit on UFOs and aliens, people who claim they've seen them (UFOs in general). In particular those who claim they've made physical contact(as in seeing an alien being) and those who claim to have been abducted by them. And this is all based on a documentary on NGC that I'd watched some time back; will try to recollect as much as I can.
There is a stereotype involved in most of the abductees' explanation of events as they unfolded, based on researched data, and it always revolves around the subject waking up from sleep, finding their room illuminated by a bright light, seeing 'figures' in their vicinity; the subject is unable to move and feels paralyzed and then the subject gets 'abducted'.
As far as I can remember, clinical procedures in Japan had proved that this is all a scenario of dream-induced stupor by brain mapping. In this hyperactive state, people often dream of various things and find themselves doing various activities, walking not the least of them. The brain actually 'switches off' the region that is responsible for controlling motor functions of the body so the person who's dreaming doesn't actually get up and start 'living his dream'. But sometimes, in those rare instances, it forgets to 'switch on' the region back to normal once the dreaming bit is over. People suffer temporary paralysis in this state and the resulting experiences (re: bright light, figures in vicinity, etc.) are other 'side-effects'. Also there was an indication that abductees those who've gone for therapy, have explained their experiences pertaining to specific questions in a hypnotized state asked by the shrink. This questioning and the cues of those questions is what's supposed to have made them believe what they believe in the first place.
I'm not doing justice to this little commentary by recalling only bits and pieces of the documentary, for which I apologize.
Re: UFOs, Aliens, Time Travel and more...
No we haven't even overcome the hurdle of space sickness or AIDS, so we're obviously very far from tackling the problems of close to light speed travel. We haven't even found a way to accelerate anything bigger than an atom to anything in the vicinity of C.
When we do have that kind of power, we might be able to test it on chimpanzees and then humans
Raaabo
Apollo said:
No we haven't even overcome the hurdle of space sickness or AIDS, so we're obviously very far from tackling the problems of close to light speed travel. We haven't even found a way to accelerate anything bigger than an atom to anything in the vicinity of C.
When we do have that kind of power, we might be able to test it on chimpanzees and then humans
Raaabo
OP
krazyfrog
Guest
Re: UFOs, Aliens, Time Travel and more...
I think only something as small as an atom could travel at the speed of light. Anything bigger will probably be shred to pieces before getting even close to the speed of light. Aeroplanes capable of Mach 3 speeds boasts of aerodynamics no other plane can. Just imagine how aerodynamic does a ship capable of speed of light would be. Even if they would manage to make a super aerodynamic ship capable of achieving the speed of light without breaking into pieces, would they manage to fit a human being inside? And what about the G-forces acting on the person accelerating so fast? Only pilots with extraordinary capabilities are capable of bearing the G-forces of a Mach 3 plane. What about the pilots of ships travelling at the speed of light?
I think only something as small as an atom could travel at the speed of light. Anything bigger will probably be shred to pieces before getting even close to the speed of light. Aeroplanes capable of Mach 3 speeds boasts of aerodynamics no other plane can. Just imagine how aerodynamic does a ship capable of speed of light would be. Even if they would manage to make a super aerodynamic ship capable of achieving the speed of light without breaking into pieces, would they manage to fit a human being inside? And what about the G-forces acting on the person accelerating so fast? Only pilots with extraordinary capabilities are capable of bearing the G-forces of a Mach 3 plane. What about the pilots of ships travelling at the speed of light?
blackpearl
The Devil
Re: UFOs, Aliens, Time Travel and more...
Has anybody thought what an observer will see if the train is travelling at speeds in excess of light? Look at the diagrams.
This is the normal case
*i13.tinypic.com/2z5j876.gif
This will what happen at speeds in excess of light
*i10.tinypic.com/2vakvbm.gif
Has anybody thought what an observer will see if the train is travelling at speeds in excess of light? Look at the diagrams.
This is the normal case
*i13.tinypic.com/2z5j876.gif
This will what happen at speeds in excess of light
*i10.tinypic.com/2vakvbm.gif
Kiran.dks
Technomancer
Re: UFOs, Aliens, Time Travel and more...
Thanks for efforts and explaining in detail about it.
It's really hard to illustrate by words as to what exactly happens at that point. My point is simple which I am unable to convey to you properly.You are right that the person can still see light in a flash. Please understand that the person will see both headlight and train at same time, but the light released by the headlight much earlier during its travel will reach the person after the train has passed through because it is travelling at the speed of light only. It is true that no one can imagine to see an object travelling at 5 times the speed of light. In our case the person is a virtual machine which has got high-speed camera.
The image is self illustrative
*img201.imageshack.us/img201/8553/lightkk5.png
Moreover it is impossible to construct an object which can travel at such high-speeds. Infact the time machine whiuch we are all talking about would also never be an object that humans will manufacture. It's rather a place in the Universe, which the humans will exploit such as Black holes, Worm holes etc.
And yes you are a good artist!
Raaabo said:
Thanks for efforts and explaining in detail about it.
It's really hard to illustrate by words as to what exactly happens at that point. My point is simple which I am unable to convey to you properly.You are right that the person can still see light in a flash. Please understand that the person will see both headlight and train at same time, but the light released by the headlight much earlier during its travel will reach the person after the train has passed through because it is travelling at the speed of light only. It is true that no one can imagine to see an object travelling at 5 times the speed of light. In our case the person is a virtual machine which has got high-speed camera.
The image is self illustrative
*img201.imageshack.us/img201/8553/lightkk5.png
Moreover it is impossible to construct an object which can travel at such high-speeds. Infact the time machine whiuch we are all talking about would also never be an object that humans will manufacture. It's rather a place in the Universe, which the humans will exploit such as Black holes, Worm holes etc.
And yes you are a good artist!
Last edited:
Re: UFOs, Aliens, Time Travel and more...
Again, you're missing the point. Where is the headlight coming from? The train? So if the headlight exists at the first point, then the train must have existed there as well... right? So if we can see the light, then we should be able to see the train as well? Yes?
See the image:
*raaabo.com/time3.jpg
At every observable point, both the train and the headlight exist. Even if the train were travelling 5 times faster than the speed of light. The train's headlights are on the train, and at any given point, light is reflecting off the train, and also being emitted from it's headlights. Since what you see, as an observer, is only light, not the motion of the train at 5C, you will always see both the train and the headlight together.
If you now want to say that you have a camera that can capture fast enough to see 5 times the speed of light, then you are not from this dimension, and neither is your camera. Because cameras can only record light, which moves at C not 5 x C. So this argument is pointless, unless you want to insist on a 5th dimension technology that can transcend time and the speed of light.
The fact remains that an obersever will always see the train and the headlights. He may see it moving backwards as blackpearl has illustrated, but he will see both together. Never just the headlight, and never just the train. I hope it's clear now.
Anyway, backwards or forwards, all you will see is a flash
Raaabo
Kiran_tech_mania said:Thanks for efforts and explaining in detail about it.
It's really hard to illustrate by words as to what exactly happens at that point. My point is simple which I am unable to convey to you properly.You are right that the person can still see light in a flash. Please understand that the person will see both headlight and train at same time, but the light released by the headlight much earlier during its travel will reach the person after the train has passed through because it is travelling at the speed of light only. It is true that no one can imagine to see an object travelling at 5 times the speed of light. In our case the person is a virtual machine which has got high-speed camera.
The image is self illustrative
*img201.imageshack.us/img201/8553/lightkk5.png
Moreover it is impossible to construct an object which can travel at such high-speeds. Infact the time machine whiuch we are all talking about would also never be an object that humans will manufacture. It's rather a place in the Universe, which the humans will exploit such as Black holes, Worm holes etc.
And yes you are a good artist!
Again, you're missing the point. Where is the headlight coming from? The train? So if the headlight exists at the first point, then the train must have existed there as well... right? So if we can see the light, then we should be able to see the train as well? Yes?
See the image:
*raaabo.com/time3.jpg
At every observable point, both the train and the headlight exist. Even if the train were travelling 5 times faster than the speed of light. The train's headlights are on the train, and at any given point, light is reflecting off the train, and also being emitted from it's headlights. Since what you see, as an observer, is only light, not the motion of the train at 5C, you will always see both the train and the headlight together.
If you now want to say that you have a camera that can capture fast enough to see 5 times the speed of light, then you are not from this dimension, and neither is your camera. Because cameras can only record light, which moves at C not 5 x C. So this argument is pointless, unless you want to insist on a 5th dimension technology that can transcend time and the speed of light.
The fact remains that an obersever will always see the train and the headlights. He may see it moving backwards as blackpearl has illustrated, but he will see both together. Never just the headlight, and never just the train. I hope it's clear now.
Anyway, backwards or forwards, all you will see is a flash
Raaabo
OP
SE><IE
Guest
Re: UFOs, Aliens, Time Travel and more...
OK, what basically you mean to say is we can't see train and headlight separately because we are bound in 4th dimention. The fastest thing for us is C and we can't see beyond it.
If we lived where 5C was the norm then we would have seen train and headlight together after 5C too(just like C in our case)
*gulp*
OK, what basically you mean to say is we can't see train and headlight separately because we are bound in 4th dimention. The fastest thing for us is C and we can't see beyond it.
If we lived where 5C was the norm then we would have seen train and headlight together after 5C too(just like C in our case)
*gulp*
This made it clear
OP
SE><IE
Guest
Re: UFOs, Aliens, Time Travel and more...
commerce students here? I hope you aren't drunk
commerce students here? I hope you aren't drunk
OP
shashank_digitreader
Guest
Re: UFOs, Aliens, Time Travel and more...
then prove it.
reddick said:One thing is clear that Their is no UFOs or Aliens exists in this universe...It's all Fake!
then prove it.