What Is the Longest Wavelength of Electromagnetic Radiation That Will

Multiple Choice

What is the longest wavelength of electromagnetic radiation that will eject photoelectrons from sodium metal for which the work function is 2.28 eV? (c = 3.00 × 10⁸ m/s, h = 6.626 × 10^-34 J ∙ s, 1 eV = 1.60 × 10^-19 J)

A) 580 nm
B) 499 nm
C) 633 nm
D) 668 nm
E) 545 nm