Time Travel?

<b>Is Time Travel Possible?</b>
Bit of a strange one this, it would be helpful if you could cast your views. I had a theory that time-travel was not possible. At least in the sense that you can't travel back in time or jump into the future using any type of machine. Sure enough relative time can be different and induced by travelling at speed or spending time in an extreme gravity, but besides this I don't believe it is.

I just need something to jog my memory so any views would be welcome.



<font color=blue>Smoke me a Kipper, I'll be back for breakfast!</font color=blue>

If in some future it would be possible to jump back in time you would already meet some guys from the future.
Travel forvard in time theoreticaly possible, you just have to build mashine that will stop the time from flowing around you (example : strong cooling device) for say, 10 years, and you are in future. But there is no way back.

-Beer! Good!
-James Hetfield

Much like I said in my first post. You can impose relative times and in effect slow down time for yourself such that where years pass on earth, only a short time passes for yourself.

This has been demonstrated twice using 2 synced atomic clocks and a jet plane. One clock was left stationary on the ground and the other was loaded on a jet plane and flown at twice the speed of sound around the earth (I think in a Concorde). The two clocks had a difference in time of something like 3 nanoseconds.


<font color=blue>Smoke me a Kipper, I'll be back for breakfast!</font color=blue>

Well sure, there's always cryogenics. I'd hardly consider that true time travel though. I mean if I'm frozen in a tank somewhere and then thawed out a millenium later, sure to me it'd feel like I'd travelled in time. However, over the course of that millenium just about anything could have happened to my cryo-tank to kill me. Time still went on for me and my cryo-tank. So I didn't really travel through time, I just suspended my life.

I'd have better protection though. That way Dr. Evil couldn't steal my mojo.

-THG isn't AMD biased. They just turn Intel mobo reviews into AMD vs. Intel debates for fun. Yeah.

LOL

If that's the case then I should be asking some southern hicks.

They must be masters seeing as they can prevent the slow down in time by having sex with their relatives.



<font color=blue>Smoke me a Kipper, I'll be back for breakfast!</font color=blue>

CROWD: A witch! A witch! A witch! We've got a witch! A witch!

VILLAGER #1: We have found a witch, might we burn her?

CROWD: Burn her! Burn!

BEDEMIR: How do you know she is a witch?

VILLAGER #2: She looks like one.

BEDEMIR: Bring her forward.

WITCH: I'm not a witch. I'm not a witch.

BEDEMIR: But you are dressed as one.

WITCH: They dressed me up like this.

CROWD: No, we didn't -- no.

WITCH: And this isn't my nose, it's a false one.

BEDEMIR: Well?

VILLAGER #1: Well, we did do the nose.

BEDEMIR: The nose?

VILLAGER #1: And the hat -- but she is a witch!

CROWD: Burn her! Witch! Witch! Burn her!

BEDEMIR: Did you dress her up like this?

CROWD: No, no... no ... yes. Yes, yes, a bit, a bit.

VILLAGER #1: She has got a wart.

BEDEMIR: What makes you think she is a witch?

VILLAGER #3: Well, she turned me into a newt.

BEDEMIR: A newt?

VILLAGER #3: I got better.

--- more ---VILLAGER #2: Burn her anyway!

CROWD: Burn! Burn her!

BEDEMIR: Quiet, quiet. Quiet! There are ways of telling whether

she is a witch.

CROWD: Are there? What are they?

BEDEMIR: Tell me, what do you do with witches?

VILLAGER #2: Burn!

CROWD: Burn, burn them up!

BEDEMIR: And what do you burn apart from witches?

VILLAGER #1: More witches!

VILLAGER #2: Wood!

BEDEMIR: So, why do witches burn?

[pause]

VILLAGER #3: B--... 'cause they're made of wood...?

BEDEMIR: Good!

CROWD: Oh yeah, yeah...

BEDEMIR: So, how do we tell whether she is made of wood?

VILLAGER #1: Build a bridge out of her.

BEDEMIR: Aah, but can you not also build bridges out of stone?

VILLAGER #2: Oh, yeah.

BEDEMIR: Does wood sink in water?

VILLAGER #1: No, no.

VILLAGER #2: It floats! It floats!

--- more ---VILLAGER #1: Throw her into the pond!

CROWD: The pond!

BEDEMIR: What also floats in water?

VILLAGER #1: Bread!

VILLAGER #2: Apples!

VILLAGER #3: Very small rocks!

VILLAGER #1: Cider!

VILLAGER #2: Great gravy!

VILLAGER #1: Cherries!

VILLAGER #2: Mud!

VILLAGER #3: Churches -- churches!

VILLAGER #2: Lead -- lead!

ARTHUR: A duck.

CROWD: Oooh.

BEDEMIR: Exactly! So, logically...,

VILLAGER #1: If... she.. weighs the same as a duck, she's made of wood.

BEDEMIR: And therefore--?

VILLAGER #1: A witch!

CROWD: A witch!



<font color=red><i>Tomorrow I will live, the fool does say
today itself's too late; the wise lived yesterday

Wait, wouldn't that make time stand still?

------------------------------
My Athlon can beat your Ferrari off the line.

Or, maybe, he's been overclocking with Irish Whisky (pun intented)

Actually, since time is an abstraction created by man there can not be any such thing as time travel except in the abstract. There is only the hear and now. It is always NOW. There is no such thing as past or future...except in the abstract...in mind or thought. Human beings and animals might be able to sense events before the happen (like animals sensing when an earth quake is imminent), but I don't think that is time travel.

I wonder...what is the speed of gravity?

the interseting thing is that it may be inevitable.

according to Stephen Hawkins perception of time is measured by entropy. Human perseption of time is guaged by the rate of entropy. We perceive time as moving forward because this is what is normal to us and our minds.

In this manner the universe is currently expanding - this dictates a formal rule os physics that entropy is increasing -> things bemore MORE random.

This is demonstrated by a coffee cup. If you drop a cup it smashes - this is because the cup has an increase in entropy and becomes more random. It's previous structure becomes less organised etc. This is the case with the universe. Now - it is also predicted that at one time the universe will cease to expand and stop, then begin to contract. What will this do for the percetion of time. The very rules will change as things actually strive to become MORE ordered. The funny thing is though that we will probably have no mechanism or tool by which to perceive this. Our minds would naturally register this as 'forward' progression of time - or it's equivalent.

Not the most accurate explanations of his work, however it always makes me thing in triangles whenever I try and work it out.

-* This Space For Rent *-
email for application details

The thing is that no mass can travel at the speed of light.


<font color=red><i>Tomorrow I will live, the fool does say
today itself's too late; the wise lived yesterday

Albert Einstein and Steven W Hawking believe that time travel is possible, and if they do then thats good enough for me
Time measures change, and if there were no change, there would be no need for time, If an asteroid for example stays the same for 5 million years without changing, then is it really 5 million years old? If there has been no deteriation in its structure and shape, then who is to say it isnt only 5 years old, or 20 mins?


Make it so, Number 1<P ID="edit"><FONT SIZE=-1><EM>Edited by garf on 07/11/01 05:46 AM.</EM></FONT></P>

I was just going to ask.
Does time exist solely because the universe is expanding?



<font color=blue>Smoke me a Kipper, I'll be back for breakfast!</font color=blue>

Einsteins theory states that you cannot reach the speed of light, for at that point your mass is infinite and you exist at all points in space at once. However, what is unclear is what happens if you traverse the speed of light and are travelling faster. There are particles that are already doing this that are travelling back in time. Stephen Hawkings explains this in A Brief History of Time, which is actually a very well written book - definitely worthy of toilet time!

The comment on 'if it could be done in the future, we'd be seeing them now' doesn't work because it would cause a paradox, whereby they came back, changed course of history so it didn't happen in exactly that way, they then don't go back, which returns you to the start where they do go back. Repeat until you have a headache.

Heh heh.

Monty Python is cool.

-THG isn't AMD biased. They just turn Intel mobo reviews into AMD vs. Intel debates for fun. Yeah.

I don't know if I believe all of Einstein's theories as absolute truth. Besides the fact that he was a bit 'excentric' to begin with, add in the fact that he was considered totally nuts when he died. And then shake in a bit of human fallability in all of us. What's left is that we have to at least grudgingly take his brilliant theories with a grain of salt.

For example, theoretically if electricity had no medium slowing it down, it would travel at the speed of light. And electrons have mass. So I believe that if you could design an electrical superconductor operating at absolute zero, you would witness electricity (matter with mass) travelling at the speed of light.

And aren't particle accelerators meant to speed up matter to the speed of light? Or is it only slightly slower than the speed of light?

Frankly, I doubt we'll ever actually travel at the speed of light anyway. We'll use something like warp or wormhole technology so that we can cheat by altering the actual amount of distance travelled instead of altering the speed at which we travel distance.

But it all leaves one to wonder, just what, if anything, could actually make time travel possible?

-THG isn't AMD biased. They just turn Intel mobo reviews into AMD vs. Intel debates for fun. Yeah.

It would be worth mentioning time traveling when we finally invent fusion reactors. Correct me if I am wrong but I think it's the same concept as particle accelerators. Only then would we barely have enough energy to try to accomplish something as "easy" as teleportation of a simple object. I am not even talking about teleporting a human being. Just the massive amounts of memory required to store all the information about the human body and the means of transporting all this information all at once are the limiting factors right now.

"He who laughs last doesn't get the joke"

Fools temporal shields!!! That’s why I am still so young and yet so witty. My theory is if you can bend space-time around you, you can avoid the silly troubles that linear time has on us carbon based creatures. Now as we all know space and time are one in the same force.
Now that scientists have proven that the universes is expanding faster than the speed of light. <A HREF="http://map.gsfc.nasa.gov/" target="_new">http://map.gsfc.nasa.gov/</A> it is apparent that the speed of light is no longer the determining factor. So Star Trek here I come ill see you folks in the 4th dimension baby. But only time can be the judge of that.

Spuddy

<font color=red>Being Evil Is Good. Cause I Can Be A Prick And Get Away With It.</font color=red>

The idea of transporting a human or any object for that matter is ... well just about impossible. You fail to take into account a few things. Your right the space required to store the information of the body is ... well quite large but the more important fact to remain is, we are always moving. Our atoms are never in the same spot at one time and nor can they stay still either. Well technically they could if we were frozen to absolute zero, but that's an entirely different topic. But to the point you can’t predict what the atoms are going to do or where they are going to be. Well I suppose you could but again that's going to require some hard core processing power, but again off topic. So all in all transporting anything would be almost next to impossible or at out current technological state unfeasible. But it would be cool.

Spuddy


<font color=red>Being Evil Is Good. Cause I Can Be A Prick And Get Away With It.</font color=red>

No offense, but it kinda shows that you failed physics...

If the ship is travelling at the speed of light, it has no length. So the person on that ship could not walk from the back to the front because they are the same thing.

And that jet plane/atomic clock experiment is velocity dependent. I think they did do an additional follow up experiment on a sattelite in orbit... same results.

Lyrics. Wasted time between solos.

No it doesn't. It is affected by black holes because it travels through the curved space around any massive object.

Lyrics. Wasted time between solos.

It hasn't been proven that light has mass... just momentum.

Lyrics. Wasted time between solos.

Time travel backwards is impossible because it violates several basic laws and creats a paradox.
The most basic laws that time travel would violate are those of conservation of energy and mass.

Cast not thine pearls before the swine

No problem, I have a great deal of interest in subjects like this. We Atheist have to know our [-peep-] or those Christians will think they have us beat. Damn them and their false god.

Spuddy


<font color=red>Being Evil Is Good. Cause I Can Be A Prick And Get Away With It.</font color=red>

Hella cool!!!!

Spuddy

<font color=red>Being Evil Is Good. Cause I Can Be A Prick And Get Away With It.</font color=red>

It has never been proven that light has mass, only mass like properties when you take energy packets or photons into account.

Einstein never said it wass possible to travel at light speed. He said, spacial warps may be formed to travel through time-space, causing you to reach a destination before a ray of light through normal space. or something like that.

Try to refute me and I'll set the <b>Knights of Ni</b> on you.


<font color=red><i>Tomorrow I will live, the fool does say
today itself's too late; the wise lived yesterday<P ID="edit"><FONT SIZE=-1><EM>Edited by holygrenade on 07/12/01 02:59 PM.</EM></FONT></P>