Page 1 of 1

What's the right equation?

Posted: Mon Oct 21, 2019 12:24 am
by Joanne Kang 3I
Is the right equation △p△m ≥(h/4π) or △p△m ≥(1/2)h???
Lavelle and the solutions manual say different things...

Re: What's the right equation?

Posted: Mon Oct 21, 2019 12:42 am
by Tiffany Dong_4e
If you're referring to the Heisenberg Uncertainty Equation, it should be the first one.

Re: What's the right equation?

Posted: Mon Oct 21, 2019 11:31 am
by christabellej 1F
Both are the same equation. This is because the h is actually h bar and stands for h/2pi. 1/2 (h bar) would then be the same as the first equation as it is h/4pi.

Re: What's the right equation?

Posted: Mon Oct 21, 2019 12:47 pm
by Ariel Davydov 1C
If I'm thinking of the same question you're referring to (1B.27), there is an error in the solutions manual that Lavelle noted in his "Solution Manual Errors 7th Edition" PDF on his website. In this question, the textbook utilized that equation (1/2 h) instead of the one taught in class. If you refer to his correction, this question makes a lot more sense. Hope this helps!

Re: What's the right equation?

Posted: Mon Oct 21, 2019 1:14 pm
by 105311039
It should be the first equation!

Re: What's the right equation?

Posted: Mon Oct 21, 2019 4:35 pm
by lauraxie2e
the first one should be the equation for heisenburg's uncertainty principle

Re: What's the right equation?

Posted: Fri Nov 01, 2019 1:16 pm
by ValerieChavarin 4F
I was confused about this too, but its the first equation with the 4pi.

Re: What's the right equation?

Posted: Fri Nov 01, 2019 1:23 pm
by Hannah Romano 4D
it should be the first equation for simplicity purposes. the second equation is the same thing as long as the "h" there is supposed to be an "h bar".