How many spacial dimensions does our universe have?

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I just finished watching this video.

Holy crap I am freaking out.

Hey Dude,
The Universe is one dimensional and I am it!

In mathematics, one can deal with many more dimensions than is found in the universe, even infinitely many dimensions, even uncountably many dimensions.

I just realized something.

Plato believed that all objects in this world are just shadows of the perfect objects in the World of Forms. A four-dimensional object would cast a three-dimensional shadow. Therefore, the perfect objects in the World of Forms could be four-dimensional.

Perhaps that's what we are. Perhaps we are just living shadows cast by perfect humans in the World of Forms ... or perhaps we are the three-dimensional shadows of four-dimensional spirits.

Perhaps that's why ghosts can pass through solid matter unobstructed. A four-dimensional spirit is unobstructed by a three-dimensional wall for the same reason we are not obstructed by a line drawn on the ground.

Perhaps Heaven and Hell are real places in physical space which exist along a higher special dimension. Perhaps you need four-dimensional weaponry to catch a ghost.

I am so glad that I do not relie on what Plato or anyone says about anything, as I am mature enough to trust my own beliefs.

Hey all! Check this movie out!

Holy crap! So trippy!

Very much debated among physicists. I'm inclined to say 4 (boring, I know). It's been said that the fourth dimension is also spatial but I believe it represents time, instead. Some say that experiments using the "Hall effect" have studied if the fourth dimension is also spatial by viewing 3d objects as shadows of 4d ones much like 3d objects have 2d shadows. But I think shadows are a 3d eddy of light that we see as 2d because we view them on 2d planes. I would say the spatial dimensions are 0th (a single point with no characteristics, other than being a point), 1st (front-back), 2nd (front-back and side to side), 3rd (front-back, side to side, and up and down).

The fourth dimension is time. Has to be.

So this begs the question "what is four dimensional sphere?".

A circle is all of the points on a plane equal distant from a single point.

A sphere is the three D equivalent: all points in space equal distant from a single point in space. Such a figure would be the same dimensions front to back, side to side, and top to bottom.

So a four dimensional sphere would be a sphere with the same temporal dimension as all of its above spatial dimensions. It would only exist in time for a finite distance that would be equal to the distance of its length, width, and height.

But how do you equate time distance with spatial distance? Isnt that peaches to pears?

Not necessarily because we have something to use as a universal yardstick, and that is the Speed of Light.

The time it takes for light to travel the spatial dimensions of our sphere is its "temporal length".

If the sphere is one meter each way. Then its temporatal length is the time light takes to go one meter (which is one three hundred thousandths of a second).

So if you see a one meter ball that pops into existence, and then disappears in one three hundred thousandths of a second ....you have just seen a four dimensional sphere!

According to scientist, our reality has up to 11 dimensions. some models predict an infinite amount.

I like 11. Reason being, a multi-dimensional structure was revealed to be present in brains.

Combine that with the "receiver"-hypothesis of consciousness, and you got yourself a basis for a book. or maybe reality...

At least 3 spatial, for sure, but as stated, some theories on the edge of modern physics, namely string theories, predict many more at extremely small scales; in a sense they're "rolled up" so tight that we can't detect them in everyday life. An analogy is: imagine a flat 2d piece of paper. If you roll it into a long cylinder, you can still see that the surface is 2d (curved into the third dimension of course) as long as you're close enough. An ant on the cylinder could move front to back OR side to side given the two dimensions, but the farther away you get as an observer, the more the object starts to look like a 1d line with only one degree of freedom. These dimensions are used to explain the complex behavior of subatomic particles, but at the moment it is only theoretical.

There are 3 spacial but some interspacial. 11 in total, if I'm not mistaken

That some string theory works with eleven dimensions does not mean that there are eleven dimensions. There might be more. There might be less. There may only be the four we know about -- three of space and one of time.

as far as i know, there are many different answers to that. 11, less, or infinity.
i like 11. reason being that i read somewhere that some scientists discovered an 11-dimensional mathematical structure in brains.

combine that with "receiver hypothesis" and you got yourself a nice recipe for speculation

That's not what you might think. With the connectivity between neurons in the brain, I'm not sure it should be surprising.

Don't forget that the Connection Machine, CM-1, had a 20 dimensional routing network. Like the brain, it physically exists in three dimensions of space and one of time.

yes, but sometimes wishywashy scifi BS makes for more interesting ideas and stories

That's an excellent point.

Science fiction would be a whole let less interesting if every space trip required a thousand generations to get there. There are only so many Rama novels that one could read.