Sections Key Equations Key Equations quantum energy E=nhf E=nhf energy of a photon E=hf E=hf maximum kinetic energy of a photoelectron K E e =hf−BE K E e =hf−BE binding energy of an electron BE=h f O BE=h f O momentum of a photon (deBroglie relation) p= h λ p= h λ Print Share Key Equations Copy and paste the link code above.