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AP® Physics 1 & 2

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Photoelectric Effect Graph - Slope

APPH12-MZXLYU

In a photoelectric experiment, light of different frequencies shines on a certain metal, and the maximum KE of emitted electrons is recorded. A graph of the data is shown, including a best-fit line.

What physical quantity is represented by the slope of the best-fit line?

A

Planck's constant

B

Work function of the surface

C

Cutoff frequency of the surface

D

Energy of incident photons