I read in an article about this new Hadron Collider that scientists think there might be 10 or 11 dimensions, if so can anyone tell me what these dimensions are or what significance they might play in the scheme of things? I am a layperson when it comes to these things, so simple down to earth reposnes please. I understand time is considered a dimension, what else?

The extra dimensions are spatial dimensions, but they are curled up to a radius that is very small. For example, you know that you can move in three independent directions, called x, y, and z. If you were very very tiny, then (if the theories you're talking about are correct), you could move in 9 or 10 independent directions.

11 dimensions doesn't some form the LHC scientists, it's a tenet of M-Theory. It originated with the work of Werner Nahm. Beyond 11 dimensions you lose a single graviton. 11th dimension is supergravity. There are theories of more than 11 dimensions also, but they dwell on there being multiple time dimensions. Which allows for more than 11 under our current theory of gravity.

do you have a source for this? I've heard some people say that F Theory has two time dimensions, but I don't see it. Do you?

Well multiple time dimensions is getting weird you know. Exciting stuff no doubt. But talk about "Weird scenes inside the goldmine". Man... As far as getting into parallel planes and all, it makes a sort of sense. Like... well let's say in the now famous experiment where Mozart traveled faster than speed of light and was recorded. Things like that. But it's tricky stuff to get your head around. The quest for unification has always been tricky. On the question about a source. An excellent place for you to start would be with the work of Itzhak Bars. IIRC he is the one who rather started the multiple timelike dimensions stuff. Here's one link, Google his name and you'll find more. Please Register or Log in to view the hidden image!

Ah right. I'm not so familiar with his work, and I haven't heard of it. either way, OP seemed to be talking about string/M theory, so I don't know if Bars' work is relevant.

Me also as a layman, could never get my head around the extra dimensions in this sence of the word? xyz and time, i get that, but what are the other 6 or 7, are they distances, times scales... what?

I don't mean to be rude....... Damn it, I probably do mean to be rude, but what the hell! I find myself asking, is the reason you can't get your head around it because you can't even be bothered to read? I mean, this is not exactly a long thread at this point, and right there in post 2, Ben the Man says this: "The extra dimensions are spatial dimensions, but they are curled up to a radius that is very small." I'm sorry to come on strong when this is only your sixth post, but I am constantly amazed by the number of people who cannot be bothered to read the other posts in a thread, but feel its fine for them to offer up their own thoughts on the matter. Rant, rant, whine, rant, pontificate, rant, moan, rant.

if it is a spatial dimension, why can't it be described using xyz?, do we have to look at it as a distance measure? how would it influence our world? and what is the use there of if it doesn't influence our world? Yes i read post 2 i even understood some of it Please Register or Log in to view the hidden image!, but what would our movement be in these other dimensions? what effect would they have on our position? i'm just saying that they explanation is so abstract and sometimes they seem to have been invented to explain the unexplainable, or even better to make a mathematical problem solvable. No I don’t have a PHD and my interest in these subjects comes only goes as far as to read Wiki pages and try to understand them, but even the wiki page on M-theories is abstract at best. You weren’t to hard on me, I’ve read some other posts around here and I hope you’re twice as hard on them

This is the same as asking why you can't describe x in terms of z. Just as x, y, and z are orthogonal, so are the new directions in string/M theory. Well, each dimension is curled up and too tiny for us to move through. Imagine a 2 dimensional lattice. At each place on the lattice, there is a little circle. This is a 2+1 dimensional space---you can be at any lattice point (x and y coordinates), but you also can be somewhere along the little curled up circle (z), too. This is more or less the only way to picture the extra dimensions of string theory Please Register or Log in to view the hidden image!

Trust me I am.Please Register or Log in to view the hidden image! It's one of my few pleasures in life. That and distributing pro-McCain campaign literature with my dick hanging out.

Those other spatial dimensions are really small. That is where the fruit flies live and within hours come to our dimension when they smell the fruit... ...just kidding....

Well as a mechanical designer I'm fully indoctrinated in XYZ dimensions, but when you explain it like that i start getting it! Thanks the LHC hopes to prove the existence of these dimensions, how would they recognize them? all their programs are calibrated to show any 'movement' in XYZ graphs?