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+ε 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=1ε. This mobility edge occurs at a frequency compatible with the Ioffe-Regel condition.