  For paraxial and non-paraxial light, numerous measures of electromagnetic
attribute are expressible in terms of photon annihilation and creation.
Accordingly, energy, angular momentum and chirality measures acquire a
consistent interpretation. From the photonic nature of light, it emerges that
an infinite hierarchy of spin-type measures depend on a difference in number
operators for modes of opposing helicity, pure circular polarization giving
maximal values. Measures of orbital angular momentum are determined by a sum of
corresponding number operators. By analysis of electric and magnetic features
in the reflection of circular polarizations, regions of prominent chiral
interaction in the interference are identified.
