This movie (http://www.revver.com/video/99898/imagining-the-tenth-dimension/) explains that there are at most 10 dimensions. This is done in a clear and convincing manner. But in the end it is said that the reason why there are at most 10 is because it includes everything (including the other universes with different physical laws). But doesn’t it contradict itself? Because then these 10 dimensions do not include universes with dimensions that are not equal to 10. Eg universes with dimensions 9 or 11. (Universa is the plural of universe).
Answer
In my opinion, but I could be boundlessly wrong, string theory is a nice mathematical construction, with no experimental evidence whatsoever as yet.
About your question
-the most common (?) string theory have 10 or 11 dimensions, but there are variants with much more and much less.. http://en.wikipedia.org/wiki/String_theory, http://en.wikipedia.org/ wiki/Why_10_dimensions%3F#Number_of_dimensions
-the mother (first) of the string theories, the Kazula-Klein theory, was based on 5 dimensions. http://en.wikipedia.org/wiki/Kaluza-Klein. It is interesting to know that Kazula himself regarded his theory as a pure mathematical trick to cram Maxwell’s and Einstein’s equations into a system of equations, without added value.
– the video has nothing to do with string theory in my opinion. rather, it’s a fun thought experiment in itself. It mixes multiple dimensions with “many worlds” interpretations.
-there are a few inconsistencies in the video as you say. I think it’s pretty silly to start with a point after three dimensions. The maker could at least have noticed that the loop in 3 dimensions is no longer a knot in 4 dimensions, and that you only become a point again after 5 dimensions… And I share your criticism that the conclusion contradicts itself. I don’t think it’s convincing at all…
Answered by
Engineer Bart Dierickx
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