Explain the laws of photoelectric emission by tutorvista
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Laws of photoelectric emission
The experimental observations on photoelectric effect may be summarized as follows, which are known as the fundamental laws of photoelectric emission.
1. For a given photo sensitive material, there is a minimum frequency called the threshold frequency, below which emission of photoelectrons stops completely, however great the intensity may be.
2. For a given photosensitive material, the photo electric current is directly proportional to the intensity of the incident radiation, provided the frequency is greater than the threshold frequency.
3. The photoelectric emission is an instantaneous process. i.e. there is no time lag between the incidence of radiation and the emission of photo electrons.
4. The maximum kinetic energy of the photo electrons is directly proportional to the frequency of incident radiation, but is independent of its intensity.
The experimental observations on photoelectric effect may be summarized as follows, which are known as the fundamental laws of photoelectric emission.
1. For a given photo sensitive material, there is a minimum frequency called the threshold frequency, below which emission of photoelectrons stops completely, however great the intensity may be.
2. For a given photosensitive material, the photo electric current is directly proportional to the intensity of the incident radiation, provided the frequency is greater than the threshold frequency.
3. The photoelectric emission is an instantaneous process. i.e. there is no time lag between the incidence of radiation and the emission of photo electrons.
4. The maximum kinetic energy of the photo electrons is directly proportional to the frequency of incident radiation, but is independent of its intensity.
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photo electric emission is basically an effect caused due to extensive excitation of electrons by the intensity of the solar effect of sun rays number of electrons transferring from the conducting surface depends upon the intensity of the light falling on the surface . there is a lowest value of energy required to excite electrons from the surface is called the threshold frequency . hope you will find it informative.
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