Long Post

Promised myself I'd do a long post today.. spent the past few days idling my life away. Not that bad la, did some reading, then watched Naruto all the way.....

Figured this will keep dawn-readers away. So here goes.......

Been reading up on some really interesting and funny discussions on digg.com & wikipedia. Basically, Time travel, and its relevance to the speed of light, quantum physics, lucid dreaming. As much as I want to make my blog boring, I will be nice and do a summary at the end of the topic in RED.

Time Travel

Going back and forth in space & time.... a dream ability eh? Much like the talent of that of the (whats his name again? ) guy in heroes. Let's look at what are the various forms of travel travel.

- Forward
- Backwards
- Across Space ( Teleportation )

Forward
Time travelling forward has been known only achievable by time dilation, a process in which, to a relative observer, time seems to speed up, or slow down. This can be done by travelling, or motion of the body. Its magnitude can be increased with speed. A logical explanation for the phenomena would be to view light responsible for time. As we move, we can be said to move in the SAME direction as light, hence causing a SMALLER difference in our relative velocities ( A Maths here ) and a difference in time.

Summary : You want to live longer? Start Moving...

Backwards
This is slightly more complex. If you are already stunned by the previous topic, I suggest u read the red lines. At the same time here, I'd try to save time by telling you time travelling backwards is IMPOSSIBLE. A theorized method of time travel would be to travel FASTER then the speed of light. ( Vaccuo ) However, this is clearly impossible, as a particle will possess almost infinite mass, hence requiring infinite energy to move any further. This is because mass increases exponentially with velocity. ( tan45° )And I've seen posts suggesting stupidity as the universe on that....

" Based on theory. But here's a theory for you. If I travel at a speed JUST under the speed of light, then I throw my hand out in front of me...isn't my hand traveling faster than the speed of light? Isn't the speed of light increased when the light source itself is moving? " - bearean on 1/05/06

I liked the retort one gave to him....

"So, out of curiosity: do you believe that if I'm on an airplane traveling 9mph under the sound barrier and I start running towards the cabin at 10mph that a sonic boom will occur because the sound barrier was broken?"

Do not attempt stupid things like those suggested....

Ok. The above was discussion on Faster-Than-Light ( FTL ) travel... Now onwards to why time travelling backwards is still impossible, assuming other unknown methods exist.

No time travellers from the future - Pretty self-explanatory, for us having no time travellers from the future clearly suggests that time travel has not been invented, and will not be, because no one has come from the future.

Grandfather paradox - We'll assume one day, someone decides to kill his grandfather. He goes back into time, and does it. However, this in turn makes it impossible for that person to have existed in the first place, since his parents wouldn't have existed in the first place. So if he ceased to exist, his grandfather would still be alive, hence allowing him to be born, and to kill the grandfather. ( Yes, its a paradox )

Many more things to debate on, self-consistency principals, lazy to go into those...

Summary : Don't try, its impossible

Across Space
This has already been done hasn't it. A living example, would be a black hole. Ok, for random idiots who don't know exactly what is a black hole, it is a region of space-time where the existing gravitational pull is so strong that nothing can escape its pull. Matter absorbed into this vicinity are compressed way beyond any possible explanatory term.

So where does space-time travel happen here? A theoretical solution of wormholes exist. What are wormholes? Simply put, it is a tunnel between two points that act like a short-cut, not across routes, but space-time. An analogy would be a worm trying to get to the other side of the apple, can instead of going around it, go through it. Hence the traverse in space-time aka teleportation.

However, one must consider explicitly the possibility of such a phenomenon. At the other end of the wormhole, lies a suggested "white hole" What is a white hole? Simply put its the exact reversal of the black hole. The black hole is known to defy certain laws of physics, however, the while hole defies all laws of physics. Because its simply impossible to reject all matter, to the extent of ejecting matter from its origin.

However, both positive and negative energy is required to create a wormhole, and a great magnitude of it, to create even a small working model. ( 1m radius = 10billion stars ) So its impossible even if you fissionise all of Earth's atoms, or unless you can harness external sources of power. Cosmic strings or supernovae maybe?

Summary : I don't know... maybe Sven can?

Getting abit tired here, I think i'll stop for here.... Are you bored yet? ^^

What but it that veils the eye?
And can possibily bleed you dry?
Forests turned tree
Your sanity at its decree