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Question: Answered & Verified by Expert
The kinetic energy of the most energetic photoelectrons emitted from a metal surface is doubled when the wavelength of the incident radiation is reduced from λ1 to λ2. The work function of the metal is
PhysicsDual Nature of MatterNEET
Options:
  • A hcλ1λ22λ2-λ1
  • B hcλ1λ22λ1-λ2
  • C hcλ1λ2λ1+λ2
  • D hcλ1λ2λ1-λ2
Solution:
2380 Upvotes Verified Answer
The correct answer is: hcλ1λ22λ2-λ1
k=hcλ1-ϕ and 2k=hcλ2-ϕ

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