### differences in equation

Posted:

**Tue Oct 23, 2018 12:42 pm**Why does the equation in the textbook say delta(p)delta(x)=h/2, but in the lecture notes, Dr. Lavelle uses h/4pi? Is there a difference? Which should I use?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=19&t=34643

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Posted: **Tue Oct 23, 2018 12:42 pm**

Why does the equation in the textbook say delta(p)delta(x)=h/2, but in the lecture notes, Dr. Lavelle uses h/4pi? Is there a difference? Which should I use?

Posted: **Tue Oct 23, 2018 12:52 pm**

I think in the textbook the h has a line through it. This is a different h value that equals h/(2pi). That's why the h/2 is still equal to h/(4pi). The equation is the same; the notation of the h just makes it appear different.

Posted: **Tue Oct 23, 2018 1:44 pm**

wow I didn't even notice that! it makes such a difference thank you