a photon of wavelength 4×10^-7 kinetic energy and velocity of photoelectron
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Substituting the values in the given expression of E: Hence, the energy of the photon is 4.97 × 10–19 J. Hence, the kinetic energy of emission is 0.97 eV. Hence, the velocity of the photoelectron is 5.84 × 105 ms–1.
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