Two identical photons of energy E ( 4 eV ≤ E ≤ 8 eV ) fall on two different metals whose work functions are in the ratio of 1 : 2 . The ratio of the kinetic energies of the most energetic electrons co

Question

Two identical photons of energy E ( 4 eV ≤ E ≤ 8 eV ) fall on two different metals whose work functions are in the ratio of 1 : 2 . The ratio of the kinetic energies of the most energetic electrons coming from each metal is 2 : 1. Work function of one of the metal is 4 eV. What is the energy of photon in eV.

TestHub · Accepted Answer

The higher work function is 4 eV; the lower is 2 eV in the stated photon-energy interval ​ E − 2 = 2 ( E − 4 ) ​ E = 6 eV ​

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