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The work function for tungsten is 4.58eV. What is the kinetic energy of electrons emitted when...

The work function for tungsten is 4.58eV. What is the kinetic energy of electrons emitted when light of wavelength 400nm is incident on the tungsten surface? (Planck constant= 6.626 x10^-34 J s= 4.136 x10^-15 eVs)

A. 0.74eV

B.1.5eV

C. 7.7eV

D. 2.9eV

E. No electrons are emitted

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