State the laws of photoelectric emission

State the laws of photoelectric emission

• The time lag between irradiation of the metal surface and emission of the electrons by the metal surface is negligible.
• For a given metal, surface there is a minimum value of frequency of radiation called threshold frequency (f₀) below which no photo electrons are emitted from the metal however intense the incident radiation may be.
• The number of photoelectrons emitted from the surface per second is directly proportional to the intensity of incident radiation for a particular incident frequency
• The K.E of the photoelectrons emitted is independent of the intensity of the incident radiation but depends only on its frequency

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