what is the relation between stopping potential and work function of a given metal?

Asked by feelinbest | 26th Feb, 2010, 10:54: PM

Expert Answer:

Dear student,

The stopping potential is the potential (energy/unit charge) or (Joules/Coulomb) that must be applied to stop the electrons from being ejected from the surface when the light is shone on it. If the energy of the incident photon is greater than the work required to remove the electron from the surface plus the applie (-) potential, electrons will leave the surface with some kinetic energy. The stopping potential is the applied potential that makes this KE=0

Kinetic Engery (KE) = stopping potential * electric charge of an electron.

KE = h*f - work

Hope this helps.

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Answered by  | 27th Feb, 2010, 10:50: AM

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