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AP Physics 2
15.5 The Photoelectric Effect
BeginnerMCQGraphicalConceptual16.2k
A quantitative graph showing stopping potential V_s on the vertical axis and incident light frequency f on the horizontal axis. Two parallel straight lines with positive slopes are drawn. The line on the left is labeled Metal 1 and intersects the horizontal axis at a threshold frequency f_{0,1}. The line on the right is labeled Metal 2 and intersects the horizontal axis at a higher threshold frequency f_{0,2}. Both lines have identical positive slopes. No other curves or markers appear.
Stopping potential versus frequency for Metal 1 and Metal 2.
An experiment measures the stopping potential \(V_s\) as a function of light frequency \(f\) for two different metallic cathodes, Metal 1 and Metal 2. The resulting data are plotted in the graph shown. Metal 2 is known to have a larger work function than Metal 1 (\(\Phi_2 > \Phi_1\)). Which of the following claims correctly explains the relationship between the graph features and the physical properties of the metals?

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