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by rbanffy
5855 days ago
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That's because dimensions are not ordered. There is no first dimension, or second, or third. For a flatlander, time is what he perceives as a third dimension. Depth may be a fourth dimension. If you wanted to do the same trick to you, you would have to flip yourself in a non-time higher dimensional space. I think any dimensional space would do. But it's early in the morning and I haven't had breakfast. Talk to you when my brain joins me. To perceive time as a dimension is useful because it helps you realize you actually perceive four dimensions the same way a flatlander perceives three. |
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If you want to do space-time calculations, yes.
because it helps you realize you actually perceive four dimensions the same way a flatlander perceives three
Absolutely not. We perceive time as time and space as space. The concept of spacetime does not help us understand or visualize higher dimensional spaces at all. It only confuses the issue, which is exactly the original complaint against the video this whole discussion is about.
Edit: One more example: Can you visualize the difference between a 3D cube moving in time, and a 4D cube moving in the 4th dimension? If you project the 4D cube down to 3D, it will look like a double cube that twists itself inside and out, but the 3D cube moving in time will just look like a 3D cube. Spacetime does not help you understanding 4D space.