Talk:Dimension
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"We can move up-or-down, north-or-south, or east-or-west, and movement in any other direction can be expressed in terms of just these three."
Can you really speak of movement in terms of just the three spatial dimensions? Doesn't the very concept of movement depend on the time dimension? Without time all you have is position and no movement. Right?
- Movement is change of location. One moment a thing is here, and another it's there. Moving is not necessarily related with time. --Inyuki 12:09, 2 Dec 2004 (UTC)
Why (how come?) our space have three dimensions of space and one of time? How did the space originate? --Inyuki 12:09, 2 Dec 2004 (UTC)
- How would a change of location occur except through or in time? Hyacinth 00:15, 3 Dec 2004 (UTC)
other dimensions
"Also, in science fiction, a "dimension" can also refer to a separate world or plane of existence, though this meaning is not discussed in this article.)"
- What article would this concept be addressed in? parallel universe? i am sure several articles aim here for that concept. - Omegatron 02:44, Apr 25, 2005 (UTC)
Electron spin
Electrons can move in 3 dimensions in space, move through time, can spin, and don't appear to have an internal structure. How can all this be accomplished if there are only 4 dimensions? Brianjd | Why restrict HTML? | 12:00, 2005 May 8 (UTC)
- An electron's position in spacetime can be described with four coordinates. An electron's _state_ takes more degrees of freedom. It's spacetime that has four dimensions. State of a system that evolves over time is often expressed in terms of Hilbert spaces with an infinite number of degrees of freedom. Different things being talked about.--Christopher Thomas 21:32, 20 Jun 2005 (UTC)
- Physics is confusing... Brianjd | Why restrict HTML? | 08:40, 2005 Jun 21 (UTC)