### Obtain the speed of the fastest electron ejected

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A metal surface is susceptible to a photoelectric threshold frequency of 8.529 x 1014 Hertz. Will the monochromatic UV light sources of wavelengths 283 nanometer, 342 nanometers, and 363 nanometers be able to eject photoelectrons from the metal, if so Obtain the speed of the fastest electron ejected?

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