## h bar

$\Delta p \Delta x\geq \frac{h}{4\pi }$

Malia Shitabata 1F
Posts: 127
Joined: Sat Aug 17, 2019 12:17 am

### h bar

I was looking at the examples in the book in Topic 1B and they use the equation $\Delta x=h/(2m\Delta v)$ except the h has a line through it to represent h bar. It seems like it's a constant 1.05457x10^-34 but what exactly does it represent? Because to calculate uncertainty in class we used $\Delta p\geq h/(4\pi \Delta x)$ and h was Planck's constant

Emily Vainberg 1D
Posts: 102
Joined: Sat Jul 20, 2019 12:15 am

### Re: h bar

h bar is just a simplified way of talking about Plank's constant. If the book uses h bar they are talking about h divided by 2π.

ℏ= reduced Planck's constant

ℏ= h/(2π)

Kimberly Koo 2I
Posts: 99
Joined: Sat Aug 17, 2019 12:17 am

### Re: h bar

h bar is also good for calculations that have precise measurements dealing with subatomic particles

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

### Re: h bar

H BAR is refering to plancks constant and manipulates it when doing problems.