# Un- uncertainity

1. Dec 22, 2007

### 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

2. Dec 22, 2007

### Hootenanny

Staff Emeritus
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.

Last edited: Dec 22, 2007
3. Dec 22, 2007

### lightarrow

Not exactly; see this thread (in particular, post n.16):