Question: In a photoelectric - effect experiment, the maximum kinetic energy of electrons is 2 . 9 eVeV . When the wavelength of the light is

In a photoelectric-effect experiment, the maximum kinetic energy of electrons is 2.9 eVeV . When the wavelength of the light is increased by 50%%, the maximum energy decreases to 1.2 eVeV . What is the work function of the cathode?

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