Einstein's "Time Dilation" Prediction Verified

[Levina]

I want a machine that allows me to live in the past again...just 11 years ago to be precise. I'd like to re-live the period between Jan-2003-Sept-2003

Sorry I am not your jeannie!!!

I watched a series by Dr. Michio Kaku, Physics of the Impossible, its a good series for sci fi fans, who wants to know things like teleportation, travelling through space, etc. One episode is dedicated to each topic, and by the end of the episode, he will suggest that all of those things are possible theoretically, but we don't have the resources yet. For example, to travel through space, we would need a starship which can bend space and time, by powering it with energy way more than the total amount of energy found in this planet.

Recently I read that scientists were able to teletransport a photon to a place 25kms away...not physically though.
Physicists Achieve Quantum Teleportation of Photon Over 25 Kilometers | IFLScience

 

[DesiGuy]

its only in theory which is based on space time plane....but very very difficult to achieve because:

1. to move a object ..energy is required and keep accelerating it ...more and more energy required..but problem is when the object is about to achieve near light speed..its mass will become infinite hence required infinite energy to move it..which is impossible.

2. for beating the speed of light...we required that objects which are not made up by light i.e every atom and molecule have electromagnetic field hence light also..so how can the same object beat the speed of light which links its atoms.

both issues are resolved thru warp speed engine as its not the ship that's moving but the space around it. There is no need to "break" the speed of light if we can build a warp engine.

@Topic: this has been proven before as well. nothing new.

 

[Kompromat]

@levina

”Ta Qayamat Shukr Goyam, Kard Gar Khuwaish Ra”

”Ah! Man Gar Baz Beenam, Rui Yaar Khuwaish Ra”

Prince Noor-ud- Din Saleem, the son of Emperor Akbar.

 

[anant_s]

is against the law of thermodynamics, i think.

I want a machine that allows me to live in the past again...just 11 years ago to be precise. I'd like to re-live the period between Jan-2003-Sept-2003

Not sure, but looks like it will violate II law of thermodynamics (Chaos/Entropy always increases).

also when people talk of time travel back, II law isn't symmetric with time. essentially it means if it was somehow possible to go back in time, you won't find the same time. @Horus I'm sure you have pleasant and cherished memories of time, but not sure you'll find the same if you could go back.
Damn the Physics

 

[Kompromat]

I'll make them more pleasent. I got thrown in a freaking desert after that.

I'm willing to pay in blood to re live those few months again.

 

[Kloitra]

No, it doesn't mean that at all.

Actually it does. Think someone moving so fast that he is aging at 1/3 the rate. That means 1 year for him would be 3 year for the stationary observer. He is 2 years in future.

This phenomenon is actually more common, though not easily observed. Any moving object age slower. Even a snail. Just that the difference in time is negligible. Another example would be planes, where GPS has to take into account relativity for better accuracy. And astronauts. Quoting wiki:

With technology limiting the velocities of astronauts, these differences are minuscule: after 6 months on the International Space Station (ISS), the astronaut crew has indeed aged less than those on Earth, but only by about 0.007 seconds

That means they are 0.007 seconds in future.

 

[janon]

Actually it does. Think someone moving so fast that he is aging at 1/3 the rate. That means 1 year for him would be 3 year for the stationary observer. He is 2 years in future.
This phenomenon is actually more common, though not easily observed. Any moving object age slower. Even a snail. Just that the difference in time is negligible. Another example would be planes, where GPS has to take into account relativity for better accuracy. And astronauts. Quoting wiki:

Yes, time goes slower in a moving reference frame. But that does not mean that the person is going into the future. It just means that the duration between two events would be shorter in his frame of reference, as compared to a stationary fellow's frame of reference. If he lights a cigarette, to him the time between lighting the match and then putting it to the cigarette would seem to take the normal time of a second or two. But to an outside observer, it would take much longer. Even two events which happen simultaneously in one frame, will happen one after the other in the other frame. But none of that means that anybody is going into the future or past. Time dilation is not time travel.

I'll illustrate it with an example:

If there is a set of identical twins, and one of them gets into a spacecraft and travels at 99.9% the speed of light, for what seems like 25 years here on earth. (Assuming that there is such a spacecraft, of course.) If he travels at that speed and returns to the earth, his twin would be a lot older, but he would have aged only a little. So the one who travelled will look almost just like before, but the one who stayed back would have grey hair, and other signs of old age. In their minds also, the one back on earth would have felt 25 years passing by, but the one who travelled would have only felt a few days go by. But both of them, when they meet, will be in the "present" - the traveller would not be in future. They would be able to shake hands and interact with each other, which would not be possible if one of them had travelled in time and gone "away" in time. (The numbers I gave are only to illustrate the point - to get the real figures, you would have to do a Lorentz transformation, which is pretty easy.)

 

[jarves]

it means future travel is possible...

No,this particular thing has noting to do with time travel.The time time does gets slower but that just means that your heart beat e..t.c. will get slower and your aging will be slow compared to people who are stationary and you are not actually goin into the future but just slowing time around you.

 

[jarves]

As janon explained in the above post a little bit about twin paradox,if anyone wants to read the full paradox briefly then.....
Concept of the Twin Paradox in Physics
This is one of the most famous and easiest paradoxes to understand.

 

[DesiGuy]

Yes, time goes slower in a moving reference frame. But that does not mean that the person is going into the future. It just means that the duration between two events would be shorter in his frame of reference, as compared to a stationary fellow's frame of reference. If he lights a cigarette, to him the time between lighting the match and then putting it to the cigarette would seem to take the normal time of a second or two. But to an outside observer, it would take much longer. Even two events which happen simultaneously in one frame, will happen one after the other in the other frame. But none of that means that anybody is going into the future or past. Time dilation is not time travel.

I'll illustrate it with an example:

If there is a set of identical twins, and one of them gets into a spacecraft and travels at 99.9% the speed of light, for what seems like 25 years here on earth. (Assuming that there is such a spacecraft, of course.) If he travels at that speed and returns to the earth, his twin would be a lot older, but he would have aged only a little. So the one who travelled will look almost just like before, but the one who stayed back would have grey hair, and other signs of old age. In their minds also, the one back on earth would have felt 25 years passing by, but the one who travelled would have only felt a few days go by. But both of them, when they meet, will be in the "present" - the traveller would not be in future. They would be able to shake hands and interact with each other, which would not be possible if one of them had travelled in time and gone "away" in time. (The numbers I gave are only to illustrate the point - to get the real figures, you would have to do a Lorentz transformation, which is pretty easy.)

but didn't he just come back from the future? if a time just another 4th dimension..i don't see why can't you just pinpoint a location in space and be in different time. In a sense, whatever you said is time travel.

 

[janon]

but didn't he just come back from the future? if a time just another 4th dimension..i don't see why can't you just pinpoint a location in space and be in different time. In a sense, whatever you said is time travel.

Why would he be "coming back" from the future? Until when was he going into the future, and when did he start coming back? Do you think that he was going into the future on his onward journey, and coming back into the present during the return trip? It doesn't work like that. Travelling at a high speed always slows down time for all events in that reference frame, irrespective of the direction of travel.

Think about it in another way - suppose he doesn't come back, but keeps on moving at 99.9% speed of light. After 25 years of earth-time, the twin on earth will be an old man, but the one in the spacecraft will still be young. But they will still be in the "present". If a powerful eye or telescope can see both of them, then that observer will see one twin aged and one twin young, but both existing in the present.

As janon explained in the above post a little bit about twin paradox,if anyone wants to read the full paradox briefly then.....
Concept of the Twin Paradox in Physics
This is one of the most famous and easiest paradoxes to understand.

Well I did not mention the "paradox" itself, because I did not want to further confuse people. The paradox arises when we ask the question of why the travelling twin remains young and the earth bound one ages, when we can think from the traveller's point of view that the earthborne one is travelling away from him. I mean, the fellow in the spacecraft can assume that he is stationary and earth is moving away from him, so shouldn't he get older and his twin stay young?

The resolution of the paradox is the understanding that both of them are NOT experiencing the same kind of motion - the one in the space craft has to have experienced acceleration, while the earth bound one did not. So the twin in the spaceship cannot assume that he was at rest, which he could have in the case of motion at uniform velocity.

The paradox and its solution can only be understood after understanding time dilation itself properly, which is why it may not be a good idea to go into that here.

 

[Hiptullha]

inface even speed greater than light is also possible with wrap drive.wrap drive is answer to interstellar travel. Nasa is working on wrape drive engines. but we have to wait for god knows how many decades.

Greater than light travel requires the energy of the Universe, which is infinity right? How is it possible to harness this?

 

[jarves]

Greater than light travel requires the energy of the Universe, which is infinity right? How is it possible to harness this?

Greater speed than lights is possible only those worlds where results occurs before its cause.In a world where you are dead before you were born.
Now the question arises do these type of world exists??,we dont know yet.
This was proposed by an Indian scientist ECG sudarshan and he named these worlds as "tacheons".

For those people who are interested....
Not only travelling at speeds comparable to light slower the time but also a object with very heavy mass slows the time around it i.e. if you stand near a heavy mass object you will be aging slower than those who are standing far away from the object.And when i say heavy mass i mean mas comparable to that of stars,black holes e.t.c.

 

[Hiptullha]

For those people who are interested....
Not only travelling at speeds comparable to light slower the time but also a object with very heavy mass slows the time around it i.e. if you stand near a heavy mass object you will be aging slower than those who are standing far away from the object.And when i say heavy mass i mean mas comparable to that of stars,black holes e.t.c.

If you saw someone go into a black hole, you'd never see the gooey and icky stuff where their body is completely destroyed but an image of them which looks static, but is moving at an incredibly slow rate.

 

[AZADPAKISTAN2009]

I guess he did not predicted his departure other wise he would be moved at speed of light to postpone things