Question

A photocathode has a work function of 2.4 eV. The photocathode is illuminated with monochromatic radiation in which the photon energy is 3.4 eV. What is the maximum kinetic energy of the photoelectrons? Let 1 eV = 1.60 × 10−19 J, the mass of an electron m = 9.11 × 10−31 kg, and Planck’s constant h = 4.136 × 10−15 eV ∙ s.

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

Answer 1

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