If $k=\nabla\cdot n$, what is the geometric relationship between $k$ and $n$? In terms of size and direction?
Is it true that $n$ is an outward-pointing normal iff $k>0$ and $n$ is inward-pointing iff $k<0$?
If $k=\nabla\cdot n$, what is the geometric relationship between $k$ and $n$? In terms of size and direction?
Is it true that $n$ is an outward-pointing normal iff $k>0$ and $n$ is inward-pointing iff $k<0$?