it is much more difficult to locate an electron, a photon, or anything else about that small. we may construct a light source that only makes one photon at a time. we can aim the light source at a piece of photographic film, let the light source make one photon, and then develop the photographic film. if we had very sensitive photographic film that could be darkened by only one photon, then we would find a tiny speck of silver where the photon ended up. a silver atom is much larger than a photon, so there would be some fuzziness about where the photon ended up, but people probably would agree that the photon must have ended up somewhere within the target formed by the silver atom. however, all we can say is that the photon must have been at that point when it ended its existence. when a photon is absorbed by an electron it gives its energy to the electron and disappears. so when it was briefly at some definite place it immediately lost all of its motion.