What Is the Maximum Kinetic Energy of an Electron in the Photoelectric Effect?

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SUMMARY

The maximum kinetic energy of an electron in the photoelectric effect can be calculated using the equation E = hv - Φ, where E is the kinetic energy, h is Planck's constant, v is the frequency of the incident light, and Φ is the work function of the material. The threshold wavelength for silver is 2762 Å, which represents the maximum wavelength that can cause electron ejection. Understanding the relationship between threshold wavelength and work function is crucial for solving problems related to the photoelectric effect.

PREREQUISITES
  • Understanding of the photoelectric effect
  • Familiarity with Planck's constant (h)
  • Knowledge of work function (Φ) in photoelectric materials
  • Basic concepts of wavelength and frequency in electromagnetic radiation
NEXT STEPS
  • Research the relationship between threshold wavelength and work function in metals
  • Learn how to calculate kinetic energy of electrons using E = hv - Φ
  • Explore the implications of the photoelectric effect in modern physics
  • Study the experimental setup for demonstrating the photoelectric effect
USEFUL FOR

Students studying physics, particularly those focusing on quantum mechanics and the photoelectric effect, as well as educators seeking to clarify concepts related to electron emission and light interaction with matter.

INAM KHAN
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Homework Statement


The photo electric effect threshold wavelength of silver is 2762A(angstrum)

Homework Equations



Calculate the maximum kinetic energy of electron?

The Attempt at a Solution


since no work function then how can I slove this? Is this be sloved by E=hv-Φ?
 
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What does "photoelectric effect threshold wavelength" mean?
 
threshold wavelength means minimum wavelength.
 
begging the question... minimum wavelength for what?
What does "photoelectric effect minimum wavelength" mean?

What is it about this wavelength that makes it the minimum for this (whatever "this" may be, you havn't said) to happen?
 
The question do not have enough information to answer the question . we need incident frequency or wavelength of light to calculate the kinetic energy .
Threshold wavelength means the maximum wavelength that should be in incident on the metal so that electron will eject. Threshold frequency is the minimum frequency that should be incident on the metal surface to eject electrons .
 
@Nikhil faraday : the idea was that the person whose homework it is should answer the question "what does threshold wavelength mean?" etc. Since understanding what that term means is basically what the homework is about, we shouldn't really say directly.
Clearly OP has not written the entire problem in the "problem statement" section of post #1... probably the entire question is not there.
However, the answer can still be expressed as an equation.

@INAM KHAN : can you relate the threshold wavelength to the work function? It should be in your notes - or look up "photoelectric effect".
(Aside: did you write the entire question in post #1)
 
I am really sorry for that.
Simon Bridge said:
@Nikhil faraday : the idea was that the person whose homework it is should answer the question "what does threshold wavelength mean?" etc. Since understanding what that term means is basically what the homework is about, we shouldn't really say directly.
 
Nikhil faraday said:
I am really sorry for that.
No harm - let's see how OP responds.
 

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