Why is the “Fourth Dimensional” representation of a cube a tesseract? If time is a dimension shouldn’t the higher dimensional representation of an object be it’s worldline/timeline?
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When people say time is the fourth dimension, they mean that time is the fourth dimension of space-time, where we have three spatial dimensions and 1 temporal dimension.
What people generally mean with “fourth dimensional” cube is a 4th spatial dimension, so not time (since time is not a spatial dimension, it’s a temporal one and behaves differently).
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