Question

What is the difference between an open surface and a closed surface?

Answer 1

Open surface:

1. An open surface has boundaries.
2. Flux calculations through open surfaces consider the flow passing through their boundaries.
3. Examples: A hemisphere, a disk, or a sheet of paper.

Closed surface:

1. A closed surface is completely enclosed, meaning it has no boundaries.
2. A closed surface is useful in Gauss's theorem for calculating flux in vector fields.
3. Examples: A sphere, a cube, or a closed cylinder.