from an energetic point of view, all the free electrons in the illuminated metal plate are like a single substance … we would be unable to understand how there could be an effect of the accumulation of luminous energy arriving on the plate up to the quantity of energy necessary for the escape of an electron
Simondon argues that the photoelectric effect forces a non-substantialist, collective understanding of the electron, dismantling the idea of a discrete bounded individual.
, Individuation in Light of Notions of Form and Information, 2020thesis