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If the minimum (threshold) energy for the emission of an electron from the surface of a particular metal is 2.51 X 10-19 J, what is the kinetic energy of an electron emitted from the surface of the metal when it is irradiated by electromagnetic radiation of wavelength 175 nanometers?

Planck's constant = 6.626 x 10-34 Js
Speed of electromagnetic radiation = 3.0 x 108 ms-1

 

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