Hi all,(adsbygoogle = window.adsbygoogle || []).push({});

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.

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Uncertainty in the position of a particle, and momentum question

**Physics Forums | Science Articles, Homework Help, Discussion**