Why can’t we get smaller than the plank length?

Question

Why can’t we get smaller than the plank length?

In: Physics

Answer 1

Things can get smaller than the plank length. That’s just the limit that “Macro physics” gives way to quantum mechanics. QM starts taking over and Heisenburg’s uncertainty principle means we can’t accurately measure distances anymore.

Unifying those two systems would be a neat trick. People have been working on it.