A photon of wavelength 4 x 10⁻⁷ m strikes on metal surface, the work function of the metal being 2.13 eV. Calculate: the kinetic energy of the emission.(1 ev= 1.6020 x 10⁻¹⁹J).
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The kinetic energy of the emission is given by the relation:
(E-W)eV
eV-2.13eV
(3.1020 – 2.13)eV
0.9720 eV
It is found that kinetic energy of the emission is 0.9720 eV.
Kinetic energy is related to motion, any object is the energy that is work due to motion .
It is then important to understand that every things need energy to move.
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