he theory of the photoelectric effect must explain the experimental observations of the emission of electrons from an illuminated metal surface. For a given metal, there exists a certain minimum frequency of incident radiation below which no photoelectrons are emitted. This frequency is called the threshold frequency.
Manas Baul
11 Years ago
When Photons hit an Metal Surface with a certain minimum Frequency,(Called The Thershold Frequency), Electrons Are Ejected. This Effect is Called Photoelectric Effect.