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Heisenberg Uncertainty Question

Posted: Sun Oct 21, 2018 11:58 pm
by Jackie Ngo 1C
I am confused about the overall concept of the Heisienberg Uncertainty Equation, as in how it derived? My TA explained in in my section, and that honestly confused me even more. I tried googling it too, but it just doesn't clear anything up for me. How can you determine the general position/velocity of an electron based off of information that isn't even certain (By mashing two waves together?)? I think I'm just conceptually weak and I need someone to dumb it down for me. Thanks so much!!!

Re: Heisenberg Uncertainty Question

Posted: Mon Oct 22, 2018 3:37 pm
by Chem_Mod
In lecture, we discussed that the derivation of the Heisenberg Uncertainty equation is beyond the level expected of this course. Instead, you should know how to apply the equation.

If you're still curious about how to derive it, here is a link to a forum about it. Again, this is extremely advanced, and you are not expected to derive it.
https://chemistry.stackexchange.com/que ... -principle

Re: Heisenberg Uncertainty Question

Posted: Mon Oct 22, 2018 3:42 pm
by Brian Hom 2F
You should not worry too much about the derivation of the Heisenberg Uncertainty equation. Just know that at an atomic scale, the measurement process influences outcome so there is a limit to the accuracy to which the momentum and position of a particle can be known simultaneously. Know Delta p x delta x >= h/4pi and
delta p=m x delta velocity.

Re: Heisenberg Uncertainty Question

Posted: Mon Oct 22, 2018 4:06 pm
by Andre_Galenchik_2L
All you have to know conceptually is that at the atomic level, one can never exactly determine the position and velocity of a particle because when they are that small, they exhibit both wavelike and particle like properties. It becomes uncertain whether to find their features through formulas we use for waves or for formulas we use for particles.