We have seen in (5.2.1) and (5.2.13) that only the magnetic fields contribute to the Lorentz force on a normal reflecting conductor for which both E ⊥ and H ⊥ = 0, so we might notionally associate hf/...We have seen in (5.2.1) and (5.2.13) that only the magnetic fields contribute to the Lorentz force on a normal reflecting conductor for which both E ⊥ and H ⊥ = 0, so we might notionally associate hf/2 with the “kinetic energy of a photon”, where kinetic energy is linked to momentum.
