Upon Being Struck by 240-Nm Photons,a Metal Ejects Electrons with a Maximum

Multiple Choice

Upon being struck by 240-nm photons,a metal ejects electrons with a maximum kinetic energy of
1) 45 eV.What is the work function of this metal? (h = 6.626 × 10^-34 J • s,c = 3.00 × 10⁸ m/s,
1 eV = 1.60 × 10^-19 J)

A) 3.73 eV
B) 3.13 eV
C) 4.33 eV
D) 4.92 eV