Photon is like a F1 race car going around a race circuit in super high speed which we cannot see. The race circuit is like the wave function defining the path the race car would take. We can’t know for sure at any one time, where this race car will be. But we do know that it must reside within the race circuit. When we are able to detect the race car precisely, it is always the race car that is detected and not the motion of the race car.
A Quest to Recover Buddha's True Teachings