Possible Duplicate:
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?
Possible Duplicate:
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?