A Photocathode Having a Work Function of 2

question 19

Multiple Choice

A photocathode having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 3.4 eV.What is maximum kinetic energy of the photoelectrons produced? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

• 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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