Light of wavelength 4000 Å is incident...

Light of wavelength 4000 Å is incident on a metal surface. The maximum kinetic energy of emitted photoelectron is 2 eV. What is the work function of the metal surface ?

6 eV

4 eV

2 eV

1 eV

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MARVEL PUBLICATION-ELECTRONS AND PHOTONS -TEST YOUR GRASP - 17

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