In a paper on microwave properties, Mudgett (1986) provides data on
dielectric constants and loss tangents for raw potatoes. For a microwave frequency of 2450 MHz and at 20°C, the dielectric loss is 64 and the loss tangent is 0.23. Determine the attenuation factor, the fi eld penetration depth,
and the depth below the surface of a potato at which the microwave power
is reduced to one-half of the incident power.