The Work Function for Tungsten Is 4

question 28

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.

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