ABSTRACT
Photon radiation is also electromagnetic radiation (EMR), a wave phenomenon traditionally described by Maxwell’s equations. At very low power levels and at high frequencies, the quantum photon description of EMR is used. For example, we count “single photons” at ultra-low light levels with photomultiplier tubes, not single waves, yet most optical phenomena such as reflection, refraction, interference, polarization and imaging make use of the mathematics of waves and EMR.
