can someone explain the multiple universe theory?

Question

and does it have anything to do with string theory?

Answer 1

It is possible that whole universe has parts that are not accessible from other parts. We know nothing can get out of a black hole. For all intents, that stuff is in a different universe.

Now, imagine a ghostly universe that we can perceive only by the gravity of the thing in our universe. That might be what the dark matter is that we detect only by the curvature it puts into light near the area where dark matter exists. But, now, imagine that ghostly universe is real to its inhabitants. They ask and answer questions on their Wahoo site. They are just like us. But, they detect us only by the little bit of gravity that our universe exerts into theirs. That, in a nutshell, is what parallel universes are all about. Like parallel lines, they never touch. One line never can fully detect the other, and yet they are both as real as any other line.

String theory takes extra dimensions of our universe (you know about length, width, depth and time) which may number 6, 10 or 24, and rolls them up into long cords called strings that just give a convenient way to do away with these dimensions so we just have to deal with our traditional four dimensional space-time. It is probably just a theory that will die away like most theories. But, it has answered some tough questions. So, it may be that the theory becomes a model for our real universe.

Answer 2

It has been noted in string theory that there are something like 10^100 possible ways for it's 11 space-time dimensions to curl up into a given vacuum state. It appears our universe represents, therefore, just a special case of a multiverse of possibilities. The other solutions would be causally decoupled from ours, so you can never disprove the the hypothis that they condensed independently from whatever transcendental multidimensional medium our universe came from, so it's possible there are others. It's that "can never disprove" part that a sticking point with scientific purists, though. It can be argued that such talk is, therefore, not science. Other counter that, although, they cannot be observed, they can be statistically inferred using Weak Anthropic Principle arguments (which leaves God out of it, buy the way). Google that.

Answer 3

The clue is in the title.

There are many different theories relating to the multiverse; brane theory is one. Many theoretical physicists are taking it seriously (as M-theory seems so powerful).
It is possible that we will be able to verify the existence of parallel universes through gravitational radiation, once NASA/ESA have got LISA completed and running (Google it) - that is assuming that they do exist.

Unless of course you're a fool, and believe that there is a God, then the idea of a multiverse seems logical (it fits in nicely with the Anthropic Principle).

http://en.wikipedia.org/wiki/Multiverse_(science)


*edit*

Daniel_T (below comment), knows nothing about it.

grungefan (another below comment), also knows nothing about it. His understanding is the application of the Many-world's Interpretation of QM...

Answer 4

It says that every time that there is more than 1 thing that can happen, multiple worlds are created where one of the things happens in each world. The number of worlds that are created is equal to how many things can happen.Of course, only 1 world can be experienced,

Answer 5

complex stuff. look into on yahoo. this could actually help!

Answer 6

its realy just a load of bull