You do a photoelectric experiment and you fin two different values of the maximu

Question

You do a photoelectric experiment and you fin two different values of the maximum kinetic energy of photoelectrons emitted from a metallic surface when light of two frequencies is incident on the surface.

When light of a frequency 7.10019x10^14 Hz is used the maximum kinetic energy is 2x10^-19 J. When light of a frequency 7.87282x10^14 Hz is used the maximum kinetic energy is 2.4x10^19 J.

From your rough experiment, find a value for Planck's constant. Hint: It is related to the slope

Answer in units of Js

Explanation / Answer

(2.4*10^-19 - 2*10^-19)/(7.87*10^14 - 7.1*10^14) = 5.19481*10^-34

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