I Why is the minimum energy equal to the energy uncertainty?

asdf
Messages
1
Reaction score
0
TL;DR Summary
Why is the minimum energy equal to the energy uncertainty?
I was watching this video on Youtube, however, I don't get the step at 14:50 where he says that ΔE≥½hf means that E0=½hf.

Could someone explain why the minimum energy is equal to the energy uncertainty?

 
Physics news on Phys.org
"Watch this obviously confusing video and then explain it to me" is a big, big ask.
asdf said:
Could someone explain why the minimum energy is equal to the energy uncertainty?
It's not.
 
  • Like
  • Love
Likes vanhees71, topsquark and berkeman
Amended: "Watch this obviously confusing 37 minute video..."
 
  • Like
Likes vanhees71 and topsquark
asdf said:
I don't get the step at 14:50 where he says that ΔE≥½hf means that E0=½hf.
It's just saying that, since the energy of any state whatever must be greater than or equal to ##hf / 2##, the energy of the lowest energy state, the ground state energy ##E_0##, is equal to ##hf / 2##.

asdf said:
Could someone explain why the minimum energy is equal to the energy uncertainty?
That's not what the above is saying.
 
  • Like
Likes vanhees71, PeroK and topsquark
Not an expert in QM. AFAIK, Schrödinger's equation is quite different from the classical wave equation. The former is an equation for the dynamics of the state of a (quantum?) system, the latter is an equation for the dynamics of a (classical) degree of freedom. As a matter of fact, Schrödinger's equation is first order in time derivatives, while the classical wave equation is second order. But, AFAIK, Schrödinger's equation is a wave equation; only its interpretation makes it non-classical...
I am not sure if this falls under classical physics or quantum physics or somewhere else (so feel free to put it in the right section), but is there any micro state of the universe one can think of which if evolved under the current laws of nature, inevitably results in outcomes such as a table levitating? That example is just a random one I decided to choose but I'm really asking about any event that would seem like a "miracle" to the ordinary person (i.e. any event that doesn't seem to...

Similar threads

Replies
15
Views
2K
Replies
3
Views
1K
Replies
20
Views
4K
Replies
12
Views
2K
Replies
13
Views
2K
Replies
1
Views
1K
Back
Top