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AP Physics 2
15.5 The Photoelectric Effect
BeginnerMCQGraphicalConceptual19.6k
A quantitative graph with Stopping Potential V_s on the vertical axis and Frequency f on the horizontal axis. Two straight, parallel lines with equal positive slopes are plotted and labeled Metal X and Metal Y. Line Metal X is positioned to the left of line Metal Y. Line Metal X intersects the horizontal axis at a threshold frequency value f_{0X}. Line Metal Y intersects the horizontal axis at a higher threshold frequency value f_{0Y}. Both lines extend into the first quadrant with identical steepness. No other labels, lines, text, or axes appear.
Stopping potential versus frequency for Metal X and Metal Y.
An experiment is conducted to investigate the photoelectric effect using two different metal surfaces, Metal X and Metal Y. Monochromatic light of varying frequency \(f\) shines on each metal, and the stopping potential \(V_s\) required to reduce the photocurrent to zero is measured. The resulting graph of stopping potential versus frequency for both metals is shown. Which of the following claims correctly compares the work functions of Metal X and Metal Y?

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