Mike Albrow discusses an empty box as a thought experiment about fundamental particles, specifically the Higgs boson.
vacuum
That title is another way of saying: “There’s no such thing as an empty box.” Let’s try to make one with a “thought experiment.” Einstein did these; they do not have to be practical, just imaginable. He came up with the theory of relativity when thinking about overtaking a light beam.
The emptiest parts of the universe aren’t so empty after all.