What's the right equation?


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Joanne Kang 3I
Posts: 50
Joined: Thu Jul 25, 2019 12:17 am

What's the right equation?

Postby Joanne Kang 3I » Mon Oct 21, 2019 12:24 am

Is the right equation △p△m ≥(h/4π) or △p△m ≥(1/2)h???
Lavelle and the solutions manual say different things...

Tiffany Dong_4e
Posts: 51
Joined: Wed Sep 11, 2019 12:17 am

Re: What's the right equation?

Postby Tiffany Dong_4e » Mon Oct 21, 2019 12:42 am

If you're referring to the Heisenberg Uncertainty Equation, it should be the first one.

christabellej 1F
Posts: 109
Joined: Sat Aug 17, 2019 12:17 am

Re: What's the right equation?

Postby christabellej 1F » Mon Oct 21, 2019 11:31 am

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.

Ariel Davydov 1C
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Joined: Thu Jul 11, 2019 12:16 am
Been upvoted: 1 time

Re: What's the right equation?

Postby Ariel Davydov 1C » Mon Oct 21, 2019 12:47 pm

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!

105311039
Posts: 107
Joined: Fri Aug 02, 2019 12:16 am

Re: What's the right equation?

Postby 105311039 » Mon Oct 21, 2019 1:14 pm

It should be the first equation!

lauraxie2e
Posts: 108
Joined: Fri Aug 09, 2019 12:17 am

Re: What's the right equation?

Postby lauraxie2e » Mon Oct 21, 2019 4:35 pm

the first one should be the equation for heisenburg's uncertainty principle

ValerieChavarin 4F
Posts: 99
Joined: Wed Sep 18, 2019 12:18 am

Re: What's the right equation?

Postby ValerieChavarin 4F » Fri Nov 01, 2019 1:16 pm

I was confused about this too, but its the first equation with the 4pi.

Hannah Romano 4D
Posts: 55
Joined: Sat Aug 24, 2019 12:18 am

Re: What's the right equation?

Postby Hannah Romano 4D » Fri Nov 01, 2019 1:23 pm

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".


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