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AP Physics 2
15.5 The Photoelectric Effect
AdvancedMCQGraphicalMathematicalConceptual14.5k
A graph of stopping potential V_s on the vertical axis versus frequency f on the horizontal axis. Two parallel, diagonal lines with positive slopes are shown. Line 1, representing Metal 1, intersects the horizontal axis at a frequency labeled f_1. Line 2, representing Metal 2, is positioned to the right of Line 1 and intersects the horizontal axis at a higher frequency labeled f_2. No numerical values are provided on the axes. The lines extend upward and to the right into the first quadrant. No other lines or points are shown.
Stopping potential versus incident light frequency for two metals.
An experiment is conducted to determine the photoelectric properties of two different metallic surfaces, Metal 1 and Metal 2. The stopping potential \(V_s\) is measured as a function of the frequency \(f\) of the incident light, and the data are shown in the graph provided. Monochromatic light of a single frequency \(f_A\), where \(f_A > f_2 > f_1\), is shone onto both metals. Which of the following correctly ranks the work functions \(\Phi_1\) and \(\Phi_2\) of the metals and the maximum kinetic energies \(K_1\) and \(K_2\) of the photoelectrons emitted from each surface?

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