Photo-electric effect and elementary charge

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SUMMARY

The forum discussion centers on designing a lab experiment to determine the elementary charge without using Millikan's oil drop method. Participants suggest utilizing the photoelectric effect and measuring the deflection of an electron beam as viable alternatives. Additionally, they propose the use of ion beams, specifically from gallium or silicon sources, to simplify the experiment by potentially neglecting the mass of the electron.

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  • Understanding of the photoelectric effect
  • Knowledge of electron beam deflection principles
  • Familiarity with ion beam generation techniques
  • Basic concepts of elementary charge and electron mass
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  • Research methods for measuring electron beam deflection
  • Explore the principles of the photoelectric effect in detail
  • Investigate ion beam generation using gallium or silicon
  • Learn about alternative methods for determining elementary charge
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Physics students, laboratory researchers, and educators interested in experimental methods for measuring elementary charge and exploring advanced concepts in particle physics.

Kristine
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I need to design a lab that would determine the elementary charge(charge of an electron). We can not use Millikan's oil drop idea, we have to come up with our own and it has to work. I was thinking of maybe incorporating the photo electric effect but I'm unsure of how to do it.:smile:
 
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Are you allowed to use the mass of an electron as a given?
 
Yes, that would make it very easy. Just measure deflection of an e-beam.

Alternatively, you could make the electron mass a negligible factor. If you have the means to create an ion beam. I believe there are ion sources of gallium or silicon.

Njorl
 

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