Radiation from hydrogen discharge tube falls on a cesium plate. Find the maximum possible kinetic energy of the photoelectrons. Work function of cession is 1.9 eV.
Given: Work function of cesium is 1.9 eV.
Radiation from hydrogen discharge tube is equal to the photon energy in ground state and is equal to 13.6eV.
Now applying photoelectric effect.
Maximum K.E = Energy of photon – Work function
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