A clean photosensitive metal is illuminated with monochromatic radiation. The experiment is repeated by independently varying the intensity and frequency of the incident light. Which statements are consistent with Einstein's photon theory of the photoelectric effect?

Select all that apply

• Option A

  At fixed frequency above threshold, increasing intensity primarily increases the number of incident photons per second and can increase the saturation current

• Option B

  At fixed intensity, increasing photon frequency increases the energy carried by each photon but can reduce the incident photon rate

• Option C

  For radiation below the threshold frequency, sufficiently large intensity must eventually eject electrons because each electron continuously accumulates energy

• Option D

  The maximum photoelectron kinetic energy is determined by photon energy and work function rather than directly by intensity