A four dimensional object spinning on it's axis.

  • Thread starter Thread starter Georgepowell
  • Start date Start date
  • Tags Tags
    Axis Spinning
AI Thread Summary
A two-dimensional object, like a circle, has a zero-dimensional point that remains stationary while it spins. Similarly, a three-dimensional sphere has a one-dimensional line as its axis, where points on that line stay fixed during rotation. The discussion proposes that a four-dimensional sphere would have a two-dimensional plane as its axis. It also raises the question of whether an n-dimensional sphere would have an (n - 2)-dimensional axis. Additionally, the conversation touches on the concept of point-like particles and their inability to spin due to lacking dimensions to spin through.
Georgepowell
Messages
179
Reaction score
0
If a two dimensional object (say a circle) spins, their is a zero dimensional 'point' that stays in the same place as it spins.

If a three dimensional object (sphere?) spins on its axis, there is a one dimensional 'line' (its axis) such that any part of that sphere that lies on that line would stay in the same position in space.

If you spun an 4d 'sphere', then would there be a 2d plane that you could call its 'axis'?

And further, if you spun an n dimensional sphere, would its axis be (n - 2) dimensional?

Any comments would be good, thanks.

edit: is this why a point like particle cannot spin? i.e. they have no dimensions to spin through?

Does a negative number of dimensions have any meaning?
 
Last edited:
Physics news on Phys.org
Maybe you can think about the revolving sphere spinning on a 2nd axis such that the original axis sweeps out a plane. Hmm...
 
comparing a flat solar panel of area 2π r² and a hemisphere of the same area, the hemispherical solar panel would only occupy the area π r² of while the flat panel would occupy an entire 2π r² of land. wouldn't the hemispherical version have the same area of panel exposed to the sun, occupy less land space and can therefore increase the number of panels one land can have fitted? this would increase the power output proportionally as well. when I searched it up I wasn't satisfied with...
Back
Top