The maximum kinetic energy of photoelectrons is 280ev when, Physics

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The maximum kinetic energy of photoelectrons is 280ev when

Solve the all parts of given problem:

Problem: The maximum kinetic energy of photoelectrons is 2.80eV . When the wavelength of the light is increased by 50%, the maximum energy decreases to 1.50eV.

Part I: What is the work function of the cathode?

Part II: What is the initial wavelength?

Please show all work and steps to determine the work function of the cathode and express your answer with the appropriate units.

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Physics: The maximum kinetic energy of photoelectrons is 280ev when

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Physics: The maximum kinetic energy of photoelectrons is 280ev when

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