Is energy always uncertain?

Question

ΔE⋅Δt⩾ℏ/2

Does the energy time uncertainty principle imply that an object would have to stay for an infinite amount of time in a state for there to be no uncertainty in the energy of that state?

Nothing is infinite so everything is uncertain. Not just energy, but every observable value. — safesphere, Jun 04 '18 at 00:55

score 0 · Answer 1 · answered Jun 03 '18 at 00:58

0

Yes indeed, that is what it implies.

answered Jun 03 '18 at 00:58

Gilbert

11,877

score 0 · Answer 2 · answered Jun 03 '18 at 02:38

0

Strictly speaking, that is correct. Although things could be thought to have difinite energy for practical purposes.

answered Jun 03 '18 at 02:38

Lory

1,035

Is energy always uncertain?

2 Answers2