What are the law's of photoelectric effect?
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Class - 12th
Sub - Physics
Chapter - Dual nature of radiation and matter
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There are mainly three laws of photoelectric emission: (i) The photoelectrons are emitted from the metal surface only when incident light has an adequate amount of energy. (ii) In photoelectric emission, the number of photoelectrons emitted per second is always directly proportional to the amount of the incident light.
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The theory of the source of photoelectric effect must explain the experimental observations of the emission of electrons from an illuminated metal surface. ... For a given metal and frequency of incident radiation, the rate at which photoelectrons are ejected is directly proportional to the intensity of the incident light.
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