The photoelectric current in a vacuum photodiode increases linearly with the intensity of incident photons, provided the light is above a specific frequency threshold. If both intensity and frequency are increased simultaneously, the photocurrent will also increase, contingent upon the photocathode's characteristics. Below a certain frequency threshold, the photoelectric current remains zero. For detailed spectral response characteristics, refer to the Hamamatsu document linked in the discussion.
PREREQUISITESPhysicists, electrical engineers, and researchers in photonics or optoelectronics who are studying the behavior of photoelectric currents in response to varying light conditions.