Why is a Planck’s length the smallest possible distance?

Question

I know it’s only theoretical, but why couldn’t something be just slightly smaller?

In: 658

Answer 1

So if you fit enough stuff into a small enough space you’ll create a blackhole. This is because black holes don’t have to be really massive like more than the Sun, they just have to have more mass than that volume of space can “handle”.

So, if you tried to measure a distance smaller than that you’d have to put something into it to bounce of it (things are measured by bouncing something with energy…. which is like everything…… off of it……. whether that’s a photon, an electron, whatever). The problem is that if you did that whatever you fit in that space to measure it would be have enough mass on that scale to create a blackhole.

So smaller distances are possible, you just can’t measure them.