Question Detail
Question
Find the maximum kinetic energy of electrons ejected from a certain material, if the material's work function is 2.3 eV and the frequency of the incident radiation is 3.0 × 10¹⁵ Hz.
Correct Answer
Option A is the correct answer.
Detailed Explanation
Photon energy E = hf = (6.626 × 10⁻³⁴)(3.0 × 10¹⁵) = 1.9878 × 10⁻¹⁸ J. Convert to eV: E = 1.9878e-18 / 1.602e-19 = 12.41 eV. K_max = E - φ = 12.41 - 2.3 = 10.11 eV ≈ 10.13 eV.
Hint
Use K_max = hf - φ. Convert photon energy to eV.