Teaching MPPSC Assistant Professor Mock Test Series 2025 Physics Dual Nature: Photon and Matter Waves The Photoelectric Effect
A photocathode has a work function of 2.4 eV. It is illuminated with monochromatic radiation whose photon energy is 3.9 eV. The maximum kinetic energy of photoelectrons ejected is
1
2.4 × 10−19 J
2
3.7 × 10−19 J
3
4.6 × 10−19 J
4
7.2 × 10−18 J