The Graph Shows the Stopping Potential for Photoelectrons as a Function

The graph shows the stopping potential for photoelectrons as a function of the frequency of the incident light for two different metals (Cs and W) . Which of the following statements is true?

A) Because the intercepts are different, Planck's constant is not constant.
B) For a given frequency of incident light, the photoelectrons from W are more energetic than those from Cs.
C) The maximum kinetic energy of the photoelectrons increases as the frequency of the incident light increases.
D) The stopping potentials for all metals are the same.
E) The threshold frequency for Cs is greater than that for W.

Correct Answer:

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