The Work Function for Tungsten Is 4 $\times$ 10^-34 J · S = 4

question 65

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 $\times$ 10^-34 J · s = 4.136 $\times$ 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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