Uncertainty: Measuring Electron Position w/o Light

[cosmic.ash]

Could the uncertainity principle be refuted if we do not measure the position of an electron by sending light at it but instead measure its grav influence on another subatomic particle

 

[Hootenanny]

Could the uncertainity principle be refuted if we do not measure the position of an electron by sending light at it but instead measure its grav influence on another subatomic particle

The HUP should not be confused with observer effect. The HUP deals with the simultaneous measurement of two quantities, not observation. In other words, the HUP doesn't care about how we measure the two quantities just the fact that we have measured them.

 

[lightarrow]

The HUP should not be confused with observer effect. The HUP deals with the simultaneous measurement of two quantities, not observation. In other words, the HUP doesn't care about how we measure the two quantities just the fact that we have measured them.

Not exactly; see this thread (in particular, post n.16):
https://www.physicsforums.com/showthread.php?t=179089&highlight=uncertainty&page=2

 

[Hootenanny]

Not exactly; see this thread (in particular, post n.16):
https://www.physicsforums.com/showthread.php?t=179089&highlight=uncertainty&page=2

Good catch and fair point lightarrow. I'll rephrase;

The HUP should not be confused with observer effect. The HUP deals with the measurement of two quantities, not observation. In other words, the HUP doesn't care about how we measure the two quantities just the fact that we have measured them.