Question Fog may be modeled, as a mixture of small spherical water droplets in air. To...
Question Fog may be modeled, as a mixture of small spherical water droplets in air. To a first approximation, the Maxwell-Garnett mixture rule for the effective permittivity of the water-air mixture takes the form: eff.oee Wheren the low frequency and optical permittivity of the fog. The relaxation time for the susceptibility of the fog is Feff and is related to the resonance frequency as f-y2 eff ·The parameters of the mixture are defined by -cair Soo,e ir E +2air-e-Eair refy =r@-/ks + (2+/Fair The permittivity and the relaxation time can be expressed in terms of the ambient temperature through the following expressions 190-0.375T εο 4.9 1.99 (2140 Here T is in degrees Kelvin. Likewise, the volume fraction of the water component in the mixture can be related to the relative speed R of the fog as