A Photocathode Has a Work Function of 2

question 4

Multiple Choice

A photocathode has a work function of 2.4 eV.The photocathode is illuminated with monochromatic radiation whose photon energy is 3.4 eV.The maximum kinetic energy of the photoelectrons produced is closest to:

• A)1.6 × 10^-19 J
• B)3.8 × 10^-19 J
• C)4.4 × 10^-19 J
• D)4.9 × 10^-19 J
• E)5.4 × 10^-19 J

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