The Work Function for Tungsten Is 4

Multiple Choice

The work function for tungsten is 4.58 eV. What is the kinetic energy of electrons emitted when light of wavelength 400 nm is incident on a tungsten surface? Planck's constant h = 6.626 × 10^-34 J · s = 4.136 × 10^-15 eV · s.)

A) 0.74 eV
B) 1.5 eV
C) 7.7 eV
D) 2.9 eV
E) No electrons are emitted.