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[necro]Physics, anyone?

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Posted May 3, '09 at 11:11pm

Kyouzou

Kyouzou

5,231 posts

I just love how no one has attempted to answer my question, lol

 

Posted May 4, '09 at 10:09pm

orion732

orion732

690 posts

Wow most of this is so over my head that its not even funny, but then again i'm only 14, but i'm wondering has anyone heard the quote
"There is no future, there is only the present"
to me that kinda ruins time travel because if you think about it the future is decided by the actions of everyone in the present, so if you actually manage time-travel it would basically be being trapped in a bubble, and put in stasis for whatever amount of time that you're going to the future for but it would be impossible to go to the past.... So then I'm confused about how the thory of traveling to the past came about...

Well, people have always wanted to travel back in time. The one way we know of to travel back in time is by going faster than light. This, however, is impossible.
 

Posted May 4, '09 at 10:15pm

thisisnotanalt

thisisnotanalt

10,092 posts

This, however, is impossible.


I assume you haven't heard of quantum entanglement or w/e it's called. It's an interesting phenomenon where two particles become entangled, but can still be separated. And everything that happened to the first particle happens to the second with no delay whatsoever. That reaction travels faster than light. So some things DOtravel faster than light.
 

Posted May 4, '09 at 10:24pm

orion732

orion732

690 posts

Heheheheh...Actually, you're wrong. Quantum enganglement is just a thought experiment made by Einstein to stump the believers of Quantum Mechanics. It can be disproved by another simple thought experiment.

Let's say we have 2 people-Person A and Person B. We give each person a piece of paper in an envelope. One of the pieces of paper has an x on it. Let's say that Person A's paper has the x on it. We then send A and B to opposite locations on the earth-the north and south poles. We make sure that they have absolutely no means of communicating with each other. When A gets to the north pole, he then opens his envelope, and sees the x. He then knows that B has the one without the x by process of elimination. No signals were sent between them, but the instant he sees the x he knows that B has the blank paper.

 

Posted May 4, '09 at 10:30pm

orion732

orion732

690 posts

Haha! That post got me to Wood Lord!

 

Posted May 4, '09 at 10:54pm

Kyouzou

Kyouzou

5,231 posts

Lol congrats Orion, but it would theoretically be possible to time travel wouldn't it, as time travel usually refers to the person going forward or backwards in time, yet not aging or dieing, by frozen (cryogenic) and then being defrosted in the future would technically mean that you time traveled, because you remained the same, unchanged and all, while the world progressed and changed around you. Of course there are always the slight odds that the day after you're frozen the world explodes in nuclear war and when you defrost you're actually in a cave man like world. (It would suck to have life threatening cancer in that moment.)

 

Posted May 4, '09 at 11:13pm

orion732

orion732

690 posts

...Well, I guess cryogenics is an option if you put time travel that way. Personally, I don't see that as time travel. You still can't go back in time, though, so once you're frozen, there's no turning back.

 

Posted May 4, '09 at 11:31pm

Wigginometry

Wigginometry

733 posts

My Physics professor told my class about this interesting theory once, but he never expanded upon it. He said that there was some speculation that a positron (an anti-electron) is actually an electron that is traveling backwards through time. This leads to the idea that all anti-matter is that same as matter except traveling the other way through time.

I wish I got to hear more about that.

 

Posted May 5, '09 at 12:10am

Gantic

Gantic

10,050 posts

Moderator

I wish I got to hear more about that.


I suggest talking to your professor after class or some other time outside of class.
 

Posted May 5, '09 at 10:28pm

orion732

orion732

690 posts

Yes, that is a current theory. It ties in with the ground-state energies of deep space. Some physicists say that space isn't actually empty-it is filled with billions and billions and billions (and billions and billions and billions and billions and billions and billions and billions and billions and billions and billions and billions and billions) of pairs of particles being born out of energy and then annihilating each other almost instantly. If these particles happen to be near a black hole, one of the particles could be sucked into the black hole, leaving the other to go free.