Question: a. Explain why the graphs of Figure 38.3 are mostly horizontal for ÎV > 0. b. Explain why photo-electrons are ejected from the cathode with

a. Explain why the graphs ofFigure 38.3 are mostly horizontal for Î”V > 0.

A more intense light causes a larger current. Intense light No current flows if AV<-Vstop- Weaker light Δν -Vstop The b. Explain why photo-electrons are ejected from the cathode with a range of kinetic energies, rather than all electrons having the same kinetic energy.
c. Explain the reasoning by which we claim that the stopping potential V_stop indicates the maximum kinetic energy of the electrons.

A more intense light causes a larger current. Intense light No current flows if AV 0.

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