13. Visible light cannot eject photoelectrons from copper surface, who – InterviewSolution

1.	13. Visible light cannot eject photoelectrons from copper surface, whose work functi4.4 eV. Why? Prove it mathematically.
Answer» If we consider photon corresponding to any colour and find its energy using E=hv.its value will come out less than 4.4 eV. so visible light cant eject electrons in copper

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