Given that a photon of light of wavelength 10,000A° has an energy equal to 1.23 eV. When light of wavelength 5000A° and intensity I₀ falls on a photoelectric cell, the saturation current is 0.40 ×10⁻⁶ A and the stopping potential is 1.36 V; then the work function is?
A. 0.43eV
B. 1.10eV
C. 1.36eV
D. 2.47eV
