\( \pmb{E = h \nu \text{ = } \frac{hc}{\lambda}} \) - Photon energy
\( \pmb{p = \frac{h}{\lambda}} \) - Photon momentum
\( \pmb{h \nu = A_{work} + E_{k_{max}}} \) - Einstein's photoelectric equation
\( \pmb{E_{k_{max}} = e U_{stop}} \) - Maximum kinetic energy