What is the kinetic energy of ejected electrons from a silver surface with work function EA = 4.73 eV if it is illuminated with light at a frequency of f = 2.28 × 1015 Hz? [h = 6.63 × 10-34 J s, c = 3 × 108 m/s, 1 eV = 1.6 × 10-19 J]
A) 0.38 eV
B) 4.72 eV
C) 9.40 eV
D) 15.1 eV
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