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Ever since reading Time-Life books in the library in the 70s I've wanted to visualize the 4th dimension. Has anyone actually achieved this? And if someone claim

• layer8 5y ago
  You can visualize 4D objects by visualizing morphing 3D objects (i.e. use time as the 4th dimension). Where it becomes tricky is 4D rotation, but I suspect that after a while you can get some limited intuition for it. Now I wonder whether it couldn’t also be visualized as the cross-product of two 2D worlds. We have two eyes with a 2D retina each, so maybe they could be trained for that. 4D obviously requires more representational space in our brain than 3D, and the per-eye visual processing apparatus would be limited to the respective pair of dimensions, so the internal visualization will probably have to be more coarse-grained or blurry in some way.
• goldenkey 5y ago
  It's really not difficult if you just consider what a dimension really represents...a degree of freedom. So a 4th spatial dimension for us would be as if each point in our 3d space had a hole at the center of it. The 4th dimension is inside of every point. Lets say this 4th dimension is not infinite and is only 1 meter long. Then each of these holes would be 1 meter deep. The 4th dimension is just the result of replacing each point in 3d space with a line. If you start with a point, and you recursively replace all points (not just endpoints), with perpendicular lines (no overlap with existing points), you'll have a simple process that constructs higher and higher dimensions. It's possible that gravity originates from a 4th spatial dimension and thus appears to be radiating outward isotropicly from the center of all matter.