The maximum kinetic energy of electrons emitted from a metal surface is 2 eV when light of frequency 6×10^14 Hz shines on it. What is the work function of the metal?
Q1. The maximum kinetic energy of electrons emitted from a metal surface is 2 eV when light of frequency 6×10^14 Hz shines on it. What is the work function of the metal?
Answer: 0.48 eV
Explanation: Work function = hf - KE_max = (6.63×10^-34 × 6×10^14)/(1.6×10^-19) - 2 = 2.48 - 2 = 0.48 eV. Other options miscalculate.