time travel.. something to think about..

By aussiefloyd_fan
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Grand Master

Zain Adeel

Posted
Posted

hey somebody here talking about that airplane thing..

like u travel faster in time then others are or something..

i read it somewhere..

but i never understood the whole idea.

can somebody here make it into simpler words?

Proficient

Crompee

Posted
Posted
hey somebody here talking about that airplane thing..

like u travel faster in time then others are or something..

i read it somewhere..

but i never understood the whole idea.

can somebody here make it into simpler words?

Time is relative to speed.

So the faster you go, the slower time goes for you (although, you experience time the same.. time is going slower for you compared to people going.

We see this in everyday things, like GPS satelites which are rotating around the earth, need there clocks adjusting every 24hours as they become 0.5seconds out of sync with earth time.

Mentor

Inklin

Posted
Posted

I believe time travel forwards or backwards isn't possible, It think what could be possible is being able to go from one place to another through a wormhole or something. so someone from the UK could jump through something and end up in New York.

It would be cool IMO.

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08993

Posted
Posted
If time travel was possible, someone from future might have already traveled back and be living with us right now.

Yes but they wouldn't come back here, travelling in time is only theoretically possible if you jump between time lines, so we would know nothing about it, ever, even if people were time travelling all day every day.

Grand Master

Zain Adeel

Posted
Posted
Time is relative to speed.

So the faster you go, the slower time goes for you (although, you experience time the same.. time is going slower for you compared to people going.

We see this in everyday things, like GPS satelites which are rotating around the earth, need there clocks adjusting every 24hours as they become 0.5seconds out of sync with earth time.

this is weird..

what i read was that its slower for the person in another frame .. as in position..

if he is static that is.

or if u got 2 person.. its slower for the one further.. ur something..

:s

and its also relative to the gravity..

:s correct me please..

Experienced

IrfanL

Posted
Posted
Yes but they wouldn't come back here, travelling in time is only theoretically possible if you jump between time lines, so we would know nothing about it, ever, even if people were time travelling all day every day.

Huh? I'm really lost. Somebody time-travels back to some time but does not arrives there??? Then whats the use?

I never understood this Schr?dinger's cat thing. I have read about it many times, but I just don't get it...

This make my brain feel really small:no:: .

Community Regular

Firecat

Posted
Posted

I tend to favor String Theory myself...

String theorists believe in the existence of multiple or parallel universes. Assuming this theory holds true, time travel would take you to an alternate reality or universe. Whatever you do there will only affect that particular timeline, not yours. In essence, the Grandfather Paradox won't be an issue.

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08993

Posted
Posted
Huh? I'm really lost. Somebody time-travels back to some time but does not arrives there??? Then whats the use?

This make my brain feel really small :no: .

OK, put simply. Very, very small things cannot make decisions by themselves. If given a choice, very small things will act out all choices simultaneously. It's not until somebody looks for one of these choices that the very small thing will make one in the eye of the observer! The act of observing is the decider.

Hence, Schr?dinger's cat is both alive and dead in the box until you open it, and then it will be either one. You can't trick very small things to make their own decisions, that was proved in practice here with what is known as the "Double Slit experiment".

Put a pea in the narrow end of a funnel, and put lots of slits of cardboard at the other end and blow the pea through, you'd image it to travel between two slits of cardboard right? In quantum mechanics, it travels through them all at the same time. The difference between the pea and the "very small thing" is that due to it's size, the pea is manipulated by other forces such as gravity, how hard you blow and even the friction of the funnel, these things "observe" the pea and interact with it which is what makes the decision. The "very small thing" is so small that nothing really interacts with it, hence no force can help it choose what slots to travel between, so it travels through them all.

You might say it bears no relevance to real life as we only really interact with big things, but big things are made of bazillions of small things.

Relevance to Time Travel? Well, what happens to all of these other possibilities that the act of observing plucks one outcome from? Do they simply collapse when the choice is made? Do they carry on regardless totally separately to this time line?

Grand Master

+Anarkii Subscriber²

Posted
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Posted
Isn't the amount of power theoretically required for "time travel" to work like... All of the solar energy our Sun generates through it's entire lifetime and then some?...

Yes, apparently the amount of power needed to go back in time at the present, cannot be recreated on Earth.

Collaborator

FrancoisC

Posted
Posted

One thing that bug me about time travel, is that if you move in time, but stay at the exact same place, aren't you going to end up in the middle of nowhere in space? I mean, planets, solar system and even galaxies are always in movement...

So time travel would be completely useless unless they find a way to control where you'll end up in space...

Grand Master

giantpotato

Posted
Posted

I was watching a pbs show a while back that theorised that if a time machine was invented in the future, people would only be able to go back in time as far as the first instant it was turned on. The machine would create a wormhole through two points in time. It's like making a tunnel through a mountain, nobody can go through it until both ends are connected. This would explain why there are no time travellers arriving currently.

Experienced

IrfanL

Posted
Posted
OK, put simply. Very, very small things cannot make decisions by themselves. If given a choice, very small things will act out all choices simultaneously. It's not until somebody looks for one of these choices that the very small thing will make one in the eye of the observer! The act of observing is the decider.

Hence, Schr?dinger's cat is both alive and dead in the box until you open it, and then it will be either one. You can't trick very small things to make their own decisions, that was proved in practice here with what is known as the "Double Slit experiment".

Put a pea in the narrow end of a funnel, and put lots of slits of cardboard at the other end and blow the pea through, you'd image it to travel between two slits of cardboard right? In quantum mechanics, it travels through them all at the same time. The difference between the pea and the "very small thing" is that due to it's size, the pea is manipulated by other forces such as gravity, how hard you blow and even the friction of the funnel, these things "observe" the pea and interact with it which is what makes the decision. The "very small thing" is so small that nothing really interacts with it, hence no force can help it choose what slots to travel between, so it travels through them all.

You might say it bears no relevance to real life as we only really interact with big things, but big things are made of bazillions of small things.

Relevance to Time Travel? Well, what happens to all of these other possibilities that the act of observing plucks one outcome from? Do they simply collapse when the choice is made? Do they carry on regardless totally separately to this time line?

Thanks man! for the explanation.

I was watching a pbs show a while back that theorised that if a time machine was invented in the future, people would only be able to go back in time as far as the first instant it was turned on. The machine would create a wormhole through two points in time. It's like making a tunnel through a mountain, nobody can go through it until both ends are connected. This would explain why there are no time travellers arriving currently.

This sounds logical.

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