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what is stopping potential ? how does the frequency effect it ? explain

what is stopping potential ? how does the frequency effect it ? explain

Grade:12th Pass

1 Answers

Rahul Kumar
131 Points
9 years ago

The stopping potential Vc is found to be changing linearly with frequency of incident light being more negative for high frequency. An increase in frequency of the incident light increases the kinetic energy of the emitted electrons, so greater retarding potential is required to stop them completely. For a given frequency v, Vc measures the maximum kinetic energy Emax of photoelectrons that can reach plate C.

 eVc = 1/2 mV2max

Where m is the mass of electron, e is charge of electron and Vmax is maximum velocity of electron. This means that work done by stopping potential must just be equal to maximum kinetic energy of an electron.

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