![Figure 3](stu3.png)
Figure 3: Spacetime uncertainty (red, solid) vs uncertainty from spherical black holes (blue, dotted)
in
dimensions, for
(left) and
(right). After [318], Figure 1. Below the
bound from spacetime uncertainty yet above the black-hole bound that hides short-distance physics
(shaded region), the concept of classical geometry becomes meaningless.
![D = 10](article388x.gif)
![g < 1 s](article389x.gif)
![g > 1 s](article390x.gif)