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

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

in the answers to questions using the uncertainty equation, do you leave it with the greater than equal to sign or just an equal sign?

Joseph Saba
Posts: 154
Joined: Thu Jul 11, 2019 12:16 am

### Re: how to express answer

Usually, with those types of questions, the uncertainty of position/momentum has to be calculated in the context of the problem. So the equal sign would be used. When talking theoretical scenarios about the Hinesburg indeterminacy then the greater than equal to sign is needed.

Angela Patel 2J
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

### Re: how to express answer

I think in lecture Professor Lavelle mentioned that in the best case scenario Δp*Δx = h/4pi, but in most situations it's actually larger than h/4pi. In the example that he did with the baseball he wrote the final velocity as v = 3.2X10^10 m/s, so I would guess that we are looking at the best case scenario in general.

AVerma_F19
Posts: 59
Joined: Thu Jul 25, 2019 12:15 am
Been upvoted: 1 time

### Re: how to express answer

In class, Prof. Lavelle used a best-case scenario and maintained an "=" in his subsequent calculations; however, I don't believe it would be wrong to include the ">"

Montana James 4G
Posts: 46
Joined: Wed Sep 18, 2019 12:21 am

### Re: how to express answer

pretty sure it depends on what your calculating. like previous response said, you're usually solving for delta(position/velocity/momentum/etc) in which case you use the equal sign.

Megan Ngai- 3B
Posts: 50
Joined: Fri Aug 09, 2019 12:17 am

### Re: how to express answer

In class, Prof Lavelle ended with a = sigg. I'm pretty sure he said it was just simpler than writing greater than or equal to.

Julieta Serobyan4D
Posts: 58
Joined: Wed Sep 11, 2019 12:17 am

### Re: how to express answer

I think equal sign would be fine in our situation.