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Author Topic:   Did a 5-D black hole brane event horizon make the universe?
New Cat's Eye
Inactive Member


Message 10 of 18 (711489)
11-19-2013 2:44 PM
Reply to: Message 8 by Diomedes
11-19-2013 12:08 PM


Re: 5D Black Holes
I have no idea how another spatial dimension would manifest, but then again, I am not a four dimensional being!
The best way I found to get a grip on it is to go the other way, dimension reductions, see what that entails, and then try to imagine rewinding that until you get back past three dimensions into the fourth. You're never really going to be able to "picture" 4 spatial dimensions though, because our brains just don't work that way.
Anyways, here we go:
A cube is three dimensions. If you reduce a cube by one dimension, then you get a square. A square is like looking straight at one side of a cube. If you hold a dice just right in front of you so you can only see one side of it, then it will look like a square.
A square is two dimensions. If you reduce a square by one dimension, then you get a line. A line is like looking straight at one edge of a square. If you hold a piece of paper just right in front of you so you can only see one edge of it, then it will look like a line
A line is one dimension. If you reduce a line by one dimension, then you get a point. A point is like looking straight down the length of a line. If you hold a pencil just right in front of you so you can only see it pointing at you, then it will look like a point.
A point is zero dimensions.
Now, what about a four dimension object, a hyper-cube. Well that is the object that if you reduce it by one dimension then you will get a cube. If you look down one section of the hyper-cube, then you will see a cube.
So imagine how you can take a point, and drag it into one dimension to create a line. Then you can drag that line into a second dimension to create a square. Then you can drag that square into a thrid dimension to make a cube. Then you could drag that cube into a fourth dimension to make a hyper-cube.
Like I said, that's not really going to help you "picture" it in your head, but hopefully you can get what it means to have one.

This message is a reply to:
 Message 8 by Diomedes, posted 11-19-2013 12:08 PM Diomedes has not replied

  
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