Quick Qs on Uncertainty Principle

[Mukilab]

Does the Uncertainty principle tell us that one person can only measure a single particle, no matter what area or distance he tries to measure another from?

 

Why doesn't this apply to other people, why can two people both view two different particles?

[ajb]

By measure (observe) a particle you mean measure its properties. The uncertianty principle does not stop you observing more than one particle at a time.

 

Think about a Helium atom. We have two electrons in orbit around the nucleus. We can still measure the spectrum.

[Mukilab]

what do you mean by the spectrum?

[ajb]

what do you mean by the spectrum?

 

The electron shells, indirectly by the emission of photons.

[Mukilab]

The electron shells, indirectly by the emission of photons.

 

Ok, thank you.