It states that it is impossible to determine simultaneously, the exact position and exact momentum(or velocity) of an electron. Mathematically, it can be given as:- ∆x×∆px ≥ h/4Π or, ∆x×∆(mvx) ≥ h/4Π or, ∆x×∆vx ≥ h/4Πm

Here ∆x is the uncertainty in position and ∆px is the uncertainty in momentum(or velocity) of the particle.

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