>>7799805 We exist in 4D spacetime, what is really 3 dimensional "slices" in a 4D picture. Imagine the tesseract picture above, two three dimensional slices along a another dimensional line. That is why the fourth dimension to us is time, the lines connecting each three dimensional slice we see as what you would think of any given "moment" in time. A purely 3 dimensional slice would be frozen in time if you will. Its easy to just imagine a square as a 2 dimensional slice of a cube and scale it up one dimension in this regard if it helps to visualise it. You can also imagine gravity as a phenomena of this fourth dimension stretching outward from our three dimensions, this is basically leading into the philosophy behind general relativity and how space-time and gravity are all really elements of the same thing.
Do I believe in a 4th Euclidean dimension? No, if I had to bet at least. Part of me believes there are more spatial dimensions that are tiny and have something to do with the four inexplicable fundamental forces.
>>7799901 Maybe I'm retarded but I don't get this. In what way could you traverse time to get from point A to point B like a tesseract? I understand space-time being bent for gravity but that is not instantaneous or a tesseract; the object still has to travel within the 3 dimensions to get from A to B.
>>7800752 >In what way could you traverse time to get from point A to point B like a tesseract >the object still travel within the 3 dimensions to get from A to B
What are you talking about? "points" A and B in 4D spacetime necessitate an additional time coordinate. An object can stay in the same spatial location and go from point A to point B because the time coordinate changes. So as each dimension (x, y, z) of the cube traverses from x1 to x2, y1 to y2, z1 to z2, time also traverses from t1 to t2. All a tesseract is in this case is just a cube in one time coordinate that connects to a cube in another time coordinate.
>>7800928 A tesseract is not a line, it's the 4 dimensional analog of a cube. There's no "wall" in the way anymore than there's something in the way that stops you from taking a flat square on a table and extending it upward to become a cube. Then you take the cube and extend that along the axis of the fourth dimension until you have a tesseract. In the case of 4D spacetime, the cube sitting on the table doing nothing for a given amount of time does that nicely. Although given that the property of a cube is that all sides are equal, I'm not sure how this works when you combine it with a time dimension since the units are intrinsically different
4th dimension is time... You can say someone you will meet them at that some place for example in front of a building... So you might have 1st dimension that is the location of that building, 2nd myb the area in front of that building and 3rd if you will go on an elevated area for example go to the 2nd floor....but you will also tell them when, at wich time do you meet them there you wouldn't just say yea meet you at your place...i mean when will you meet them??? And there you have it time is the 4th dimension that we can't acces
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