explain parallel universes?

Question

I think I understand what the theories say. I know there are many different theories, but I am looking for a basic idea of some of them. The one I know is the one that theorizes that everytime there is a random chance, the universe splits and creates a universe for each outcome. How accurate is this? What are some other theories?

Answer 1

Scientific American magazine produced a special small issue about this very topic. Here is an attempt to put it all into a nutshell.

A parallel universe could exist if our three-dimmensional universe went on virtually infinitely. The conditions that occurred here to create the universe as we know it could happen again given enough opportunities.

I do not buy into the idea not because it would be a waste of existence but because it is very likely that our three-dimensional universe, although very large, is finite.

On the other hand, if our three-dimensional universe exists in a higher-dimensional universe, then there would be no reason to exclude the possible existence of parallel universes.

The end conclusion is that it may be very difficult to prove the idea because of the tremendous distances involved. Even if our universe were nearly infinitely large, the fastest thing of which we know is light. For a parallel universe (one exactly like our own) to exist, there would likely be several others in the way of us seeing it.

The number of separate universes needed to produce a random copy of ours is an awfully big number; thus pushing its location to such a great distance that we could never know about it.

However, again, we are not necessarily limited to needing to see a remote universe to prove its existence... but that knowledge has not been created or discovered yet.

As far as a different universe being created moment by moment to account for every possible outcome, this is a possiblity. And oddly enough, we may have already experienced this to a very small degree when the double-slit experiment is performed. See - http://en.wikipedia.org/wiki/Double-slit_experiment.

Regardless, this subject is gigantic. I can only hope that I have helped to shed a reasonable amount of light upon it.

Answer 2

there is an unproven theory that at every place in history where two decisions or two or more outcomes could have occurred they did and from each of those outcomes a new universe came into being as a result of that particular outcome. i like to use the battle of hastings as a for instance.in our universe William of Normandy won the battle and there is another where king Alfred won, and one where there was no clear cut winner and so forth.not too difficult a concept. but we have no way to prove or disprove it.

Answer 3

i think that parallel universe theory's are just stating that all times exist at once there are hundreds of possibilities but only one action can be selected and preformed at one time to create a certain outcome. so when you make a choice the consequences of different action still exist but were never executed .