It is not exoteric, King of Nowhere, it is science. And that is the point!
I find awesome to have a fantasy setting (exoterics galore) based on good old hard physics.
Brandon weave a much more compelling tale this way.
I remember when I first read this scene,where Kabsal shows Shallan this effect and I first thought that it was just plain cognitive realm affecting the physical one. As I read the audiobook version, I did not have the drawings to relate.
Good point Red032, upvoted!