The idea is to be able to determine if an "observation" has been made. If you could measure some difference in the electron's behavior other than the interference pattern, could you determine exactly what causes collapse?
If the slit experiment is looking at photons, and a photon has a certain...
If you didn't know if the "observation" tool was on or off, could you tell if a single electron had been "observed?" Does wavefunction collapse influence the electron in any measurable way? (Besides the built-up detections on the screen.)
I understand that GR predicts that as an object's speed increases, so does it's mass. I wanted to know if there have been any observations that confirm this, by calculating the gravitational attraction of an object at varying speeds.