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Q.
Which one of the following is true in photoelectric emission
Dual Nature of Radiation and Matter
Solution:
For photoelectric effect frequency of the incident light should be greater than the threshold frequency of the metal.
Photoelectric current is directly proportional to the square of the amplitude of
light.
Maximum kinetic energy of photoelectrons $=h v-\phi$
where, h is planks constant.
$v$ is frequency of incident light
$\phi$ is work function of metal.
Threshold frequency is property of the material not of intensity of incident light.