Find the minimum amount of energy required to eject electron

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Homework Help Overview

The discussion revolves around determining the minimum energy required to eject an electron from a metal surface in a photodiode, specifically within the context of the photoelectric effect. Participants are exploring the relationship between stopping voltage, frequency, and the work function of the material involved.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants are examining the definition of the metal surface in the context of the stopping voltage and its relation to the photoelectric effect. Questions about the meaning of terms like "threshold frequency" and the appropriate value of Planck's constant are raised, along with considerations of experimental versus theoretical approaches.

Discussion Status

The discussion is active, with participants providing insights into the relationship between photon energy and electron ejection. Some guidance has been offered regarding the use of standard values for constants, while others are still seeking clarification on specific terms and their implications in the problem.

Contextual Notes

Participants are navigating the complexities of experimental data and theoretical concepts, including the use of different values for Planck's constant based on prior experimental results. There is an emphasis on understanding the definitions and implications of various terms related to the photoelectric effect.

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Homework Statement


Find the minimum amount of energy required to eject electron from the metal surface inside the h/e apparatus's photodiode.

Homework Equations


Photoelectric Effect Equation
E = hf = hc/ wavelength = eV0

The Attempt at a Solution


Does the metal surface inside the h/e apparatus photodiode refers to the stopping voltage ?
 
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You want to experimental investigation or theorical?
 
Experimental investigation

From the collected data , I have plotted a stopping voltage versus frequency graph. I have the following values
work function (eV) , Planck constant , threshold frequency

I need to know what does the matal surface inside the h/e apparatus photodiode refer to in order to solve this question
 
If you obtain v0 , hv0 is energy required to eject one electron because in photoelectric effect each electron absorb single photon and before consume its energy can not absorb another photon. Therefore hv0 is bounding energy of electron in metal
 
Hmm what is hV0 ? I mean the h
Is it Planck constant? h? Or other thing?
 
h is Planck constant and v0 is threshold frequency and hv0 is photon energy of incident wave.
 
Hi
I have found the the threshold frequency for this equation but I have one more problem.
Which Planck constant should i use to solve this question?
What I mean is because in my previous question(not shown here) , I was asked the determine the Planck constant through experimental result and I have found out that the Planck constant is equal to 6.69 x10^-34.

so should i use the standard Planck constant or the experimental constant that i found out?
 
Use standard value for Planck constant which is equal to 6.626×10^-34 with dimension j.s .
 

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