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Dual Nature of Radiation question

2021 · Shift 2 · Q57

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JEE Advanced
Physics
Dual Nature of Radiation
2021 · Shift 2 · Q57

Dual Nature of Radiation question

2021 · Shift 2 · Q57

JEE AdvancedPhysicsDual Nature of RadiationNumerical+4 / −1

In a photoemission experiment, the maximum kinetic energies of photoelectrons from metals P, Q and R are EP, EQ and ER, respectively, and they are related by EP = 2EQ = 2ER. In this experiment, the same source of monochromatic light is used for metals P and Q while a different source of monochromatic light is used for the metal R. The work functions for metals P, Q and R are 4.0 eV, 4.5 eV and 5.5 eV, respectively. The energy of the incident photon used for metal R, in eV, is

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Numerical answer

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