I am quoting the following phrase from my book

" ... in Einstein's picture, photoelectric effect arises from the absorption of a single quantum of radiation by a single electron ... "

My question:

  1. Why can't multiple photons strike the electron at the same time?
  2. After emission from the metal, why doesn't the electron furthers absorbs photons to reach higher kinetic energy than described by Einstein's photoelectric equation ($K_{max} = h\nu - \phi_0$)?

P.S. I apologise for asking a stupid question.

  • $\begingroup$ See also Photoelectric effect, low frequency light $\endgroup$ Commented Nov 15, 2020 at 10:16
  • $\begingroup$ Multiple photons can certainly strike an electron; that just wiggles the electron, causes 'refractive index', a bit of phase-retardation, but not absorption unless something OTHER than just same-place-same-time justaposition, i.e. absorption of the photon. $\endgroup$
    – Whit3rd
    Commented Nov 15, 2020 at 23:34