@MegaMichelle Einstein's opposition to quantum mechanics included a paper complaining that the equations for alpha particle emission described an expanding probability sphere, but in a cloud chamber, the alpha particle makes a linear track. He wasn't thinking about all the other atoms in the cloud chamber. The probability sphere "collapses" into a line when the alpha particle starts affecting the behavior of other atoms. Physicists call that "a measurement" or "an observation" that reduces (collapses) the area of probability from being a cloud (or other shape) into a point or line. It could be said that the wave of probability collapses into a particle of actuality.
https://youtu.be/gY6Jr7tB2fU?si=N7YP-GZjVS7bKDst
We see light behaving as a wave most of the time and behaving as photon only when it hits matter.
#science #einstein #quantumMechanics