Electromagnetic absorption in a disordered medium near a photon mobility edge

A frequency regime in which electromagnetic waves in a strongly disordered medium undergo Anderson localization in d=3 dimensions is suggested. In the presence of weak dissipation in d=2+ɛ it is shown that the renormalized energy absorption coefficient increases as the photon frequency ω approaches a mobility edge ω^* from the conducting side as α~(ω^*-ω)^-(d-2)ν2, ν=1ɛ. This mobility edge occurs at a frequency compatible with the Ioffe-Regel condition.