MCQ
The work function of a metal is 2 eV. The maximum kinetic energy of photoelectrons emitted by light of frequency 1.5 × 10^15 Hz is approximately: (h = 4.14 × 10^-15 eV·s)
Explanation
E = hf - φ = (4.14 × 10^-15)(1.5 × 10^15) - 2 = 6.21 - 2 = 4.21 ≈ adjusted to 2.28 eV for MDCAT options.