I’ve heard some conflicting things, is the Planck Length the smallest possible length or not?
In: Physics
The planck length is a distance sufficiently short that our current math cannot well describe what happens at shorter distances. This is, if I recall, because quantum gravity becomes important at such distances and we do not yet understand quantum gravity.
Thus, it is not the smallest possible length, but it is the approximate smallest length that we can predict things at.
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