![]() To clarify: the reason the fourth “geometrical” dimension doesn’t really exist here is because of just that - it doesn’t exist. This shows that time is also a “dimension” in the sense that they correspond to coordinates. You arrive at the location only to find that the star went supernova thousands of years ago - while you may be at the Location (defined by 3 dimensions or XYZ) you are not at the correct point in the universe, (space-time location) because you have arrived too late. You know the coordinates (XYZ) of the location and are somehow able to get there (say by teleportation) so you decide to go Let’s say we want to pinpoint a point in the universe - say, a place where a star will go supernovae. If a dimension isn’t used in this way it doesn’t really “exist” because nowhere in the universe needs to use that coordinate. Therefore we should be able to pinpoint different places in the universe (any place actually) using all dimensions. “Dimensions” are straight lines that work together in a way that you can pinpoint coordinates in different spaces (themselves defined in dimensions) using 2 or more It could be argued the 4th dimension is time. If you put a ball inside a box and then looked thru in the 4th dimension, you’d see not only the ball, but inside the ball, inside the box, and all the ways and such. Essentially, the 4th dimension would be seeing EVERYTHING. A strange “shape” would suddenly appear from out of nowhere, grow in size wildly and in unpredictable ways, and then shrink back to nothingness again.ĤD is so hard to imagine and describe because it’s extremely unfamiliar and our minds are nowhere near able to completely process what it really looks like (if it exists at all). If a 3D sphere were to pass thru, it would appear as if something flat (a line) had suddenly come into existence from nowhere, grow to a certain degree until reaching halfway thru, and then shrink out of existence again.ĤD from 3D is the same way. From their world, they see everything as flat in both directions. We see 2D things on a screen (side scrollers for sake of argument). Simplest way to describe it is the same way we see the second dimension from the third.
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