Anyone who watched both Battle of Britain and Dunkirk understands which of the two is a better war movie
Time Travel
-
For the second, i don’t believe that there are other ways, which means: i don’t believe we could travel in time
Sorry, I did not mean it in that way. I talking more about traveling long distances. Cosmic strings might work for that.
-
What? No complaints! …
I mean compliments! - Xi -
What? No complaints! …
I mean compliments! - XiWhere would you get the anti-matter from? What would you do with the energy once it is released?
-
Oops! Sorry, I meant to add that it all combined at the end of a “downspout” to form a “true matter universe.” - Xi
-
Well, if Light cannot escape a Black Hole, how can we detect them?
-
I do not believe time travel is possible.
I think Stephen Hawking explained it best when he said that time travel is not possible because nobody from the future has visited us yet.
-
Well, if Light cannot escape a Black Hole, how can we detect them?
the same way you can detect something behind you - it casts a shadow (i.e. the absense of light)
-
Well, if Light cannot escape a Black Hole, how can we detect them?
Well most of the known universe is shrouded in dark matter. Plus we can see X-ray and infra-red radiation signals given off from the strong gravity fields of a blackhole?
-
@F_alk:
Yup. Nothing / nothing useful (that is being discussed, wether there can be some kind of information leakage or not) can escape a black hole.
That’s wrong.
-
@Deviant:Scripter:
I do not believe time travel is possible.
I think Stephen Hawking explained it best when he said that time travel is not possible because nobody from the future has visited us yet.
Which is an experimentalists point of view, and one i agree (even if i think Hawking is usually overestimated ).
Well, if Light cannot escape a Black Hole, how can we detect them?
@TG:
Plus we can see X-ray and infra-red radiation signals given off from the strong gravity fields of a blackhole?
Exactly, matter accumulates a lot of energy when falling towards the hole. Part of that energy is emitted as radiation. And as long as the matter has not fallen into the event horizon, this radiation still reaches us.
@Deviant:Scripter:
@F_alk:
Yup. Nothing / nothing useful (that is being discussed, wether there can be some kind of information leakage or not) can escape a black hole.
That’s wrong.
It’s not :)
(g9ving you as much evidence for my stance as you did for yours….)
why i am wrong ? -
Well F_alk, I hate to use Stephen Hawking again, but I think I must:
“Black holes are usually thought of as objects with such strong gravity that nothing, not even light, can escape from them. However, Stephen Hawking has shown that black holes can radiate energy. The reason goes back to quantum mechanics and the uncertainty principle. For very brief periods of time, matter or energy can be created from “empty” space because no such thing as truly empty space exists. Hawking realized that if a particle/anti-particle pair came into existence near the event horizon of a black hole, one might fall into the hole before annihilating its anti-particle. The other particle could then escape the gravitational clutches of the black hole, appearing to an outside observer as radiation.”
-
So, we cannot see the black holes themselves, but since the pull of it’s gravity is so strong, we can see the energy pooling up ready to be sucked in?
-
So, we cannot see the black holes themselves, but since the pull of it’s gravity is so strong, we can see the energy pooling up ready to be sucked in?
maybe consider them to be like magnetic fields (VERY crude analogy). a body/solution/molecule subject to a magnetic field (for example, in an MRI/NMR (nuclear resonance imaging) machine will become excited. This excitement has a signiture (likely multiple signitures) that may register in different ways. One of these might well be captured by: infra-red/spin-spin coupling/ etc. (i.e. something that does not get sucked into the black hole).
i hope this is a little clear - sorry, i’m no astrophysicist, however i do find imaging fascinating. -
“Sorry, I did not mean it in that way. I talking more about traveling long distances. Cosmic strings might work for that.”
Yes, but cosmic strings evolve and eventually decay due to the radiation and energy they give off. How would you get two cosmic strings together or at least close enough to a black hole to do this? Then you would have to find some way for your time machine to loop around the cosmic string, as well as well the necessary mass energy too travel further back in time. :(
“I think Stephen Hawking explained it best when he said that time travel is not possible because nobody from the future has visited us yet.”
But I always brought up to believe that a time machine cannot go back further than the point where the time machine was created. :(
For example, traveling back further back in time we would open ourselves to many different paradoxes. What would happen if I traveled back in time to killed my father, heaven forbid? Can I travel back further in time then when I was born? Would I cease to exist? Of course I could be wrong. Maybe the reason for this is because our events done in the past from the future could open us to the possibility of parallel or alternate universes, which might explain why no one has contacted us from the future. Time no longer follows a straight line but branches off into many different universes.“So, we cannot see the black holes themselves, but since the pull of it’s gravity is so strong, we can see the energy pooling up ready to be sucked in?”
Correct! Look at it this way, Sir Yanny, before matter passes into a black hole, it is crushed by the strong gravitational field, which causes the matter to emit radiation that escapes prior to the destruction of matter.
“maybe consider them to be like magnetic fields (VERY crude analogy). a body/solution/molecule subject to a magnetic field (for example, in an MRI/NMR (nuclear resonance imaging) machine will become excited. This excitement has a signiture (likely multiple signitures) that may register in different ways. One of these might well be captured by: infra-red/spin-spin coupling/ etc. (i.e. something that does not get sucked into the black hole).
i hope this is a little clear - sorry, i’m no astrophysicist, however i do find imaging fascinating.”I find you fascinating! ^_~ It is not everyday that I get to meet someone with such a great understand of both medicine and cosmology :D
-
@TM:
“maybe consider them to be like magnetic fields (VERY crude analogy). a body/solution/molecule subject to a magnetic field (for example, in an MRI/NMR (nuclear resonance imaging) machine will become excited. This excitement has a signiture (likely multiple signitures) that may register in different ways. One of these might well be captured by: infra-red/spin-spin coupling/ etc. (i.e. something that does not get sucked into the black hole).
i hope this is a little clear - sorry, i’m no astrophysicist, however i do find imaging fascinating.”I find you fascinating! ^_~ It is not everyday that I get to meet someone with such a great understand of both medicine and cosmology :D
as opposed to “cosmotology” - a science that yet eludes me :)
(and thank you - you are too kind) -
Yes, but cosmic strings evolve and eventually decay due to the radiation and energy they give off. How would you get two cosmic strings together or at least close enough to a black hole to do this? Then you would have to find some way for your time machine to loop around the cosmic string, as well as well the necessary mass energy too travel further back in time.
duh, I know that. :-? I was just saying that Cosmic Strings were at least more feasible then using wormholes.
Yes, but cosmic strings evolve and eventually decay due to the radiation and energy they give off. How would you get two cosmic strings together or at least close enough to a black hole to do this? Then you would have to find some way for your time machine to loop around the cosmic string, as well as well the necessary mass energy too travel further back in time.
Hmmm… went back and killed parts of my family, eh? This should be “interesting.” :wink:
-
@TG:
Yes, but cosmic strings evolve and eventually decay due to the radiation and energy they give off. How would you get two cosmic strings together or at least close enough to a black hole to do this? Then you would have to find some way for your time machine to loop around the cosmic string, as well as well the necessary mass energy too travel further back in time.
duh, I know that. :-? I was just saying that Cosmic Strings were at least more feasible then using wormholes.
Yes, but cosmic strings evolve and eventually decay due to the radiation and energy they give off. How would you get two cosmic strings together or at least close enough to a black hole to do this? Then you would have to find some way for your time machine to loop around the cosmic string, as well as well the necessary mass energy too travel further back in time.
Hmmm… went back and killed parts of my family, eh? This should be “interesting.” :wink:
TM, I’d watch out for older versions of TG if I were you!
-
Do not worry, I will! :D
-
Dont worry Tm can Take TG ne day. she can Launch a Cosmic Happy ray and will Rid TG of his Evil Thoughts ;)
-
Evil thoughts, huh? :roll: That’s interesting coming from you. :wink:
Suggested Topics
