Photo-electric effect and elementary charge (1 Viewer)

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

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:


Homework Helper
Are you allowed to use the mass of an electron as a given?


Guy in a red jumpsuit
Science Advisor
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.


The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Members online