Dimensions
in sentence
455 examples of Dimensions in a sentence
It used to be that there were two primary
dimensions
along which you could divide things.
And we can't conceive of dreaming in both
dimensions
at the same time.
It's time for us to dream in multiple
dimensions
simultaneously, and somewhere that transcends all of the wondrous things we can and will and must do lies the domain of all the unbelievable things we could be.
He proposed that our universe might actually have more than the three
dimensions
that we are all aware of.
That is in addition to left, right, back, forth and up, down, Kaluza proposed that there might be additional
dimensions
of space that for some reason we don't yet see.
So, I'd like to tell you something about the story of these extra
dimensions.
So Kaluza said, well, maybe there are more
dimensions
of space.
So he imagined that the world had four
dimensions
of space, not three, and imagined that electromagnetism was warps and curves in that fourth dimension.
Number one: if there are more
dimensions
in space, where are they?
But this illustrates the fact that
dimensions
can be of two sorts: big and small.
And the idea that maybe the big
dimensions
around us are the ones that we can easily see, but there might be additional
dimensions
curled up, sort of like the circular part of that cable, so small that they have so far remained invisible.
But deeply tucked into the fabric of space itself, the idea is there could be more dimensions, as we see there.
Now that's an explanation about how the universe could have more
dimensions
than the ones that we see.
And the wonderful thing is that superstring theory has nothing to do at first sight with this idea of extra dimensions, but when we study superstring theory, we find that it resurrects the idea in a sparkling, new form.
When you study the mathematics of string theory, you find that it doesn't work in a universe that just has three
dimensions
of space.
It doesn't work in a universe with four
dimensions
of space, nor five, nor six.
Finally, you can study the equations, and show that it works only in a universe that has 10
dimensions
of space and one dimension of time.
Now you might think about that and say, well, OK, you know, if you have extra dimensions, and they're really tightly curled up, yeah, perhaps we won't see them, if they're small enough.
But it raises the question: are we just trying to hide away these extra dimensions, or do they tell us something about the world?
First is, many of us believe that these extra
dimensions
hold the answer to what perhaps is the deepest question in theoretical physics, theoretical science.
But we believe the answer for why those numbers have the values they do may rely on the form of the extra
dimensions.
And string theory suggests that those 20 numbers have to do with the extra
dimensions.
So when we talk about the extra
dimensions
in string theory, it's not one extra dimension, as in the older ideas of Kaluza and Klein.
This is what string theory says about the extra
dimensions.
But, as you can see, the extra
dimensions
fold in on themselves and intertwine in a very interesting shape, interesting structure.
And the idea is that if this is what the extra
dimensions
look like, then the microscopic landscape of our universe all around us would look like this on the tiniest of scales.
When you swing your hand, you'd be moving around these extra
dimensions
over and over again, but they're so small that we wouldn't know it.
Now, the second issue that I want to finish up with is: how might we test for these extra
dimensions
more directly?
Is this just an interesting mathematical structure that might be able to explain some previously unexplained features of the world, or can we actually test for these extra
dimensions?
The hope is that if the collision has enough energy, it may eject some of the debris from the collision from our dimensions, forcing it to enter into the other
dimensions.
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