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Measuring extra-dimensions
I was watching a layman's documentary and it said:
"The 11th dimension is incredibly small, like a long tube about $10^-30m$ in diameter".
How can we know the general sizes of extra dimensions?
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Note that $10^{-30}$ m is smaller than ay tool we currently use can measure. – dmckee --- ex-moderator kitten Jun 01 '12 at 12:49
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I know, so how can we know the sizes of these dimensions? Given that we can't see them – ODP Jun 02 '12 at 15:44
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@ODP: 11 dimention is just the theory no one has yet proved it, hence noone ever measured it – Xinus Apr 23 '17 at 11:03