However, the variation in kinetic energy is relatively small compared to the energy of the incident photon, and for most purposes, it can be assumed that the kinetic energy of the emitted electrons is the same when monochromatic light falls on a metal surface. So, to answer your question, the kinetic energy of each and every electron is not exactly the same, but it is very close, with only small variations due to the distribution of electrons within the metal :') ye to out of syllabus hogya (idk exactly since ncert nhi pdhi) pr thanks mam for questions