Simple Photoelectric Effect Conceptual Question

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SUMMARY

The discussion centers on the photoelectric effect, specifically the relationship between photon energy and the work function. The equation KEMax = hf - φ is highlighted, where φ represents the work function, the minimum energy needed to eject an electron. It is established that if the photon energy (hf) equals the work function (φ), the kinetic energy of the ejected electron is zero, indicating that no excess energy is available for motion. This confirms that photon energy must exceed the work function for electron ejection to occur.

PREREQUISITES
  • Understanding of the photoelectric effect
  • Familiarity with the concepts of photon energy and work function
  • Basic knowledge of kinetic energy equations
  • Ability to interpret scientific equations and symbols
NEXT STEPS
  • Study the implications of varying photon frequencies on electron ejection
  • Explore the concept of work function in different materials
  • Learn about the applications of the photoelectric effect in modern technology
  • Investigate the historical experiments that led to the understanding of the photoelectric effect
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Physics students, educators, and anyone interested in the principles of quantum mechanics and the photoelectric effect.

fallen186
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This is more of a conceptual question.

Homework Statement


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1.KE_{Max} = hf-\phi

2.\phi = Work Function. The minimum energy required to free an electron with a photon

3.E=hf This it the energy of a photon
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In my book it says that" hf > \phi" then electrons can be ejected" and ""If the light frequency is too low, such that the photon energy hf is less than the work function \phi, then there is simply insufficeient energy in any given photon to free an electron.

What is the kinetic energy of an electron if the energy of a photon is the same as the Work Function? Like what happens?
 
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the kinetic energy of an electron is zero
Like what happens? !
 

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