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Class 12PhysicsDual Nature of Radiation and matterPhotoelectric Effect by Lenard and it's Observations
Medium

Threshold frequency for a metal is $10^{15} \ Hz$. Light of $\lambda = 4000 \ \mathring{A}$ falls on its surface. Which of the following statements is correct?

  • A
    No photoelectric emission takes place
  • B
    Photo-electrons come out with zero speed
  • C
    Photo-electrons come out with $10^3 \ m/s$ speed
  • D
    Photo-electrons come out with $10^5 \ m/s$ speed
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Class 12 Questions

Class 12

Physics Questions

Chapter

Dual Nature of Radiation and matter

Subtopic

Photoelectric Effect by Lenard and it's Observations

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