= 27d567bc2d48d9f40e9ccc20ea370b15)
wnoise comments on The Graviton as Aether - Less Wrong
You are viewing a comment permalink. View the original post to see all comments and the full post content.
= 783df68a0f980790206b9ea87794c5b6)
Loading…= b715d02e85f7b3b4ae65ca3d3e450868)
Subscribe to RSS Feed
Powered by Reddit
= f037147d6e6c911a85753b9abdedda8d)
You are viewing a comment permalink. View the original post to see all comments and the full post content.
Comments (134)
Actually, E&M has been described as a warping of a 4+1-dimensional space-time (in combination with gravity). http://en.wikipedia.org/wiki/Kaluza–Klein_theory
It had some problems.
You know something impressive is happening when '4+1' doesn't equal '5'.
It's common shorthand for 4 spatial dimensions, and 1 time-dimension, stressing that there is indeed a split, and that not all dimensions are equivalent. Perhaps, given the compactification of 1, it should be 3+1+1, but I've never seen that used.
Thanks, I wasn't sure whether the +1 was the time or the compact dimension.
Generally, it means that one of the signs is reversed in the 'inner product'.