B I have question regarding quantum physics (localizing an electron)

[sadaronjiggasha]

TL;DR

As QP says it is uncertain that where you found electron.

As QP says it is uncertain that where you found electron. But its not the same phenomena that one fan blade running so fast that you cant see where the blade is. You can only see the blade on a particular position if you use high resulation camera and its position depend on when you take the picture. I know very novice question, still want to know. Thank you.

 

[DrClaude]

As QP says it is uncertain that where you found electron.

This is not what quantum physics says. It says that there are states, such as stable states of an electron in the hydrogen atom, where you can only say the probability of finding the electron at a given position. When the position of a particle is measured, it will always be localized (within measurement error).

When first encountering quantum mechanics, one is tempted to try and fit things into a classical frame, as it is what our classical brains can best do. Try and resist that urge and take the quantum world to be what it is. I think that you will find this most satisfying in the long run (without having to unlearn incorrect things) even if means that you can't really make sense of quantum mechanics at first.

 

[sadaronjiggasha]

Thank you for your answer. Yes it is realy hard to think differenly when your brain all ready occupied with general physics. I will try to think differently.

 

[Heidi]

there is also the fact that in classical physics particles have definite properties even if you do not measure them. it is not the case in QM. supposing it would lead to false conclusions.

 

[sadaronjiggasha]

there is also the fact that in classical physics particles have definite properties even if you do not measure them. it is not the case in QM. supposing it would lead to false conclusions.

Is it called observer effect?

 

[Nugatory]

Is it called observer effect?

No. The observer effect, that observing a system will change it in some way, is present in classical physics as well as quantum (although classically it can be made arbitrarily small).

 

[Heidi]

An example can be given with the maximally entangled pairs of photon (the famous Bob and Alice measurement)
A source emits photonic systems with these properties with these properties (no other ones)
the number occupation is 2
allways the same energy
a null global momentum
a null global angular momentum
You can see that you have no property assigned to what Bob or Alice could measure.
there is no local existing things that they can measure but they can verify the nullity of the sum of
two same measurements . the source emits correlations not local properties.