### Uncertainty Value

Posted:

**Thu Oct 17, 2019 6:06 pm**When the uncertainty is some value plus minus another value (e.g. 2.35±0.1 pm), is the uncertainty value 0.1 or is the value altogether the uncertainty?

Created by Dr. Laurence Lavelle

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

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=19&t=47838

Page **1** of **1**

Posted: **Thu Oct 17, 2019 6:06 pm**

When the uncertainty is some value plus minus another value (e.g. 2.35±0.1 pm), is the uncertainty value 0.1 or is the value altogether the uncertainty?

Posted: **Thu Oct 17, 2019 6:30 pm**

The uncertainty value would be 0.2pm because the position could be at 2.34 to 2.36.

Posted: **Thu Oct 17, 2019 10:46 pm**

the uncertainty value is 0.2 because the actual value would lie between 2.34 - 2.36.

Posted: **Thu Oct 17, 2019 10:51 pm**

The uncertainty value is 0.2 because you add .1 and subtract .1 from the given value, giving a total uncertainty value of 0.2.

Posted: **Thu Oct 17, 2019 10:51 pm**

The uncertainty value is 0.2 because you add .1 and subtract .1 from the given value, giving a total uncertainty value of 0.2.

Posted: **Fri Oct 18, 2019 6:26 pm**

What happens if the uncertainty is less than h/4pi?

Posted: **Sat Oct 19, 2019 10:48 pm**

Whenever there's a ±(number), the uncertainty would be taking into account both. :)

So in your case, ±0.1, it would be 0.2.

So in your case, ±0.1, it would be 0.2.

Posted: **Sat Oct 19, 2019 11:24 pm**

Arianna Perea 3H wrote:What happens if the uncertainty is less than h/4pi?

The best scenario would be equal to h/4pi.

Posted: **Sun Oct 20, 2019 8:40 pm**

The answer would be .2 because that's the value that is uncertain. It is the difference of the possible positions.