Threshold Frequency in Photoelectric Effect

Threshold frequency is the minimum frequency of incident light required to eject electrons from a metal surface in the photoelectric effect. Below this frequency, no electrons are emitted, regardless of the intensity of light. The threshold frequency is specific to each metal and depends on its work function. When light with frequency equal to or greater than the threshold frequency strikes the metal surface, electrons are ejected as photoelectrons.

threshold frequency is the minimum frequency of light that can cause electrons to be ejected from a metal surface.