The amplitude is the value of the wave function at a certain position and time.
How, then, do we see a particle in a specific position when its wave function is spread across all space?
It is important to emphasize that the wave function of the system has not changed itself.
Again, the wave function of the system itself does not change.
But is the wave function itself "real" in any traditional sense?
Do this a thousand times and you will begin to see the overall shape of the wave function.
This I believe is common with each of these wave function described processes.
This is called the solution space of the universal wave function.
The wave function of this situation is going to collapse quite soon.
It is in this way related to the wave function.