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Question: Answered & Verified by Expert
The maximum kinetic energy of emitted photoelectrons depends on
PhysicsDual Nature of MatterKCETKCET 2018
Options:
  • A Intensity of incident radiation
  • B Frequency of incident radiation
  • C Speed of incident radiation
  • D Number of photons in the incident radiation
Solution:
1926 Upvotes Verified Answer
The correct answer is: Frequency of incident radiation
In photoelectric effect, the maximum kinetic energy of emitted photoelectrons depends on the frequency of incident
radiation. We have
$K E=h v-\phi$
Where $\phi$ is work function, which is the minimum energy required to remove electrons from the metal plate; $f$ is frequency
of incident radiation; h is Planck's constant.
Therefore, $(K E)_{\max } \propto f$.

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