Dual Nature of Radiation and Matter

Question: Work function of a metal is 2.1 eV. Which of the waves of the following wavelengths will be able to emit photoelectrons from its surface



1) 4000 Å, 7500 Å
2) 5500 Å, 6000 Å
3) 4000 Å, 6000 Å
4) None of these
Solution: Explanation: No Explanation
Photon and Photoelectric Effect

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