A surface whose work function is 28 ev is illuminated by a, Physics

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A surface whose work function is 28 ev is illuminated by a

A surface whose work function is 2.8 eV is illuminated by a light whose wavelength is 116 nm. What is the maximum velocity of a photoelectron emitted from the surface? The speed of light is 3 × 10^8 m/s and Planck’s constant is 6.63 × 10?34 J · s. Answer in units of km/s

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