The original paper by Heisenberg that discusses the Uncertainty principle has the following relation
ΔxΔp ≈ h
where x position, p momentum.
Meaning, you can't do better than Planck's constant in the above relation. The expression has a minima at 'h'.
Is this expression exactly equal to 'h' or is it just an approximation that Heisenberg estimated it to be?
