Skimming through some articles, I learned there is a thing called the stopping potential. Does that mean you don’t want to increase the voltage too much?
Also, if I were to do an experiment using a phototube/photoelectric cell, what would be the best conditions to get the best results?
-Thanks in advance!
In: Physics
The stopping voltage is dependant on the energy of the incoming photons and is the minimum value needed to produce a repulsive charge on the receiving plate sufficient to prevent electrons from making the jump.
The vacuum potential is the amount of energy needed to apply to an electron for it to become fully unbound from the material and be ejected from the plate. Any amount of energy in the photon greater than the vacuum potential becomes the electron’s kinetic energy. The stopping voltage is whatever reverse voltage you apply to the two plates which is necessary to repel electrons generated from photons of a *particular wavelength or lower*.
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