Ap Eapcet
Atomic Structure
AP EAPCET 2025 - 26th May Morning Shift
MCQ+1 / -02025
The work function of Cu is $7.68 \times 10^{-19} \mathrm{~J}$. If photons of wavelength 221 nm are made to strike the surface of the metal, the kinetic energy (in J) of the ejected electrons will be ( $h=6.63 \times 10^{-34} \mathrm{Js}$ )