Question

Why the photo electric current proportional to the intensity of incident radiation ?

Answer 1

Answer:

The threshold frequency depends on the material being illuminated. Electrons are emitted from the surface almost instantaneously, even at low light intensities. When a photoelectric effect is observed, the number of electrons ejected is proportional to the intensity of the incident light.

Answer 2

Answer:

Photoelectric current is independent of frequency :It requires a minimum threshold frequency. With increase in frequency KEmax increases,but PEcurrent remain constant. ... With increase in intensity of radiation,photoelectrons increases,hence photoelectric current increases.