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AP Physics 2
15.5 The Photoelectric Effect
AdvancedMCQGraphicalMathematicalConceptual16.3k
Stopping potential vs. frequency for two different metals.
Stopping potential vs. frequency for two different metals.
An experiment is conducted to investigate the photoelectric effect using two different metallic cathodes, Metal 1 and Metal 2. The stopping potential \(V_s\) required to reduce the photocurrent to zero is measured as a function of the frequency \(f\) of the incident light, resulting in the two parallel lines shown in the graph. Which of the following claims correctly identifies the slope of these lines and provides the correct physical justification for why the slope is identical for both metals?

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