Hi all, I just can't wrap my head around this one. It should be fairly easy, but i'm lost! 1. The problem statement, all variables and given/known data Suppose that the uncertainty in the position of a particle is of the order of its de Broglie wavelength. Show that in this case the uncertainty in its momentum is of the order of it's momentum. 2. Relevant equations Not 100% sure... Delta x is similar to the wavelength Delta p is similar to Plancks constant over wavelength Therefore delta x delta p are similar to Plancks constant 3. The attempt at a solution Well I can see how delta x and delta p can be related together to the wavelength, but after that I'm lost. Any help much appreciated! I'm a B.Sc Mechanical Engineer doing an entry level nuclear physics course and I'm holding on... just.